That’s exactly what Canter is now offering with PeopleAggregator.net. The founder of Macromedia has been working in stealth mode without VC funding for the past three years, creating a platform that allows users to create their own personalized and customized meta-social networks.

If, for example, you have an account with AIM for instant messaging, LiveJournal, for blogging, Flickr, for photo sharing and del.icio.us for your bookmarks, you can sign onto the PeopleAggregator site to organize and manage your profile, email, blog, photos, videos, and links all under one roof with a single digital identity. (AIM access is not yet available. See below.)

Canter is hard at work persuading owners of social networks and Web services to join his open environment. He’s leveraged long-term relationships that go back even before his work with Tribe.net (an early regionally-defined social network) and MediaBar (which offered a digital jukebox, multiplayer gaming, and closed-circuit broadband ten years before it rolled out to the masses). One such relationship is with AOL, which later this fall will make its 45 million AIM Pages accessible. Yahoo! is on the bubble, reports Canter in an exclusive interview with Jack Myers Media Business Report, advising him “if that day comes, and AOL supports your API’s, Yahoo! will sign on.” Microsoft, with its upcoming meta-identity platform, InfoCards, is also expected to partner, says Cantor.

Regarding Digiaro’s statement, Canter believes that the NewsCorp SVP is “talking trash” and is only referring to portable personas within MySpace. From an advertising perspective, MySpace must deliver autonomous and separate channels, or as Canter puts it, “the ability to separate porno girls from clean, sports people.” Even with the growth of open social networks, Canter doesn’t believe that MySpace will change its current tactics: “MySpace and FaceBook will continue to maintain the status quo. They’ll convince Madison Ave to give them money as an anesthetic, not even realizing that the game’s changed.”

There are now an estimated 450 social networks with the numbers growing. Google owns Orkut and Dodgeball. Facebook has a lock on the college market. There’s Xanga, Bebo, Sconex, Tagworld, and Cooltalk. Just since this spring, a plethora of what’s been deemed “Family 2.0″ social networks have launched, including Amiglia, Miniti, Cingo, Roundbook, OurStory, Zamily, and Famundo. With alternatives popping up delivering specialized offerings to targeted communities, it will be difficult, perhaps impossible, for MySpace to maintain its exponential growth.

At this point MySpace’s shadow is so long that competitors are lined up waiting to see what’s next. In Advertising Age’s Screwing up MySpace: A News Corp. How-to Guide, Simon Dumenco asserts that NewsCorp will destroy the social network if it forces branding down the mouths of its community. While the studios have successfully created landing pages for TV shows and movies (X-Men: The Last Stand has 2.5 million “friends”), MySpace’s jumping the shark moment, suggests critics, would be when Axe deodorant creates its own MySpace identity, for example. When that happens, the critics argue, MySpace will have become a “stealth infomercial” and users will abandon ship.

But Dumenco’s Advertising Age piece misses the mark. Branding isn’t the real challenge for MySpace. It’s Canter’s PeopleAggregator challenge and users’ desire to integrate their online and mobile identities across multiple programs. Asserts Canter, “It’s import/export that Ross Levinsohn (president of News Corp Interactive) is most worried about. That’s the foundation of a user-centric ID. By March of next year, he asserts, MySpace’s armor will begin to show its chinks. Users will demand, to paraphrase Ronald Reagan, Mr. Murdoch, tear down this (fire) wall.

Despite what Digiaro says, it’s unlikely that MySpace will initially allow its users to move their identities across the Web. When and if this policy changes, it might hobble PeopleAggregator in the short term. But in the long term, Cantor insists his platform will create a level playing field. While PeopleAggregator might light a fire under MySpace, it creates an even greater conundrum for networks like LinkedIn, where exclusivity is a primary value of the network.

If PeopleAggregator and similar services gain momentum, MySpace is likely to continue its growth internationally, and then can be expected to plateau unless it continues to identify and foster the growth of new communities. As Google launches Google Checkout (its alternative to PayPal) and makes portability seamless across the Web, and as open networks become the new, new thing, the walled gardens of social networking spaces will come tumbling down. If Canter has his way, this shifting paradigm in the online world will emerge “all of a sudden; open is cool.”

Addendum: Last week, it was widely reported that Friendster was awarded a patent governing online social networking. As reported by TechCrunch, “Friendster has a number of prominent investors and Kleiner Perkins put in additional funds this February. CNN’s The Browser blog writes “Suing rivals for patent infringement is no way to make friends — but it is a way to make money.” When asked whether licenses or lawsuits were likely, Friendster President Kent Lindstrom told RedHerring.com, “it’s way too early to say…We’ll do what we can to protect our intellectual property.”

For more information on PeopleAggregator, contact Marc Canter at marc@broadbandmechanics.com.

Jerry Weinstein also writes the Parry Social “Verge” TV Fanblog at MediaVillage.com.