Blog tech and advertising company Six Apart has acquired micro-blogging platform Pownce for an undisclosed sum, VB reports. But don’t expect Pownce, which lets users broadcast short messages (including videos, photos and mp3s) to be embedded into any of Six Apart’s current blogging tools—at least not in its current form—as Six Apart is pulling the plug on the service as of Dec 15. Pownce’s lead developers Leah Culver and Mike Malone will likely take on similar roles within Six Apart, and its technology will be pulled into Six Apart’s overall infrastructure.

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Pownce was founded in January 2008 by Culver and Digg vets Kevin Rose and Daniel Burka; and though the service was hyped as Twitter’s top competitor, it ultimately failed to catch its rival in terms of user adoption. But clearly, the micro-blogging space remains hot: Facebook was eyeing a Twitter buyout as recently as a month ago (for about $500 million worth of its stock, no less), Stocktwits, a Twitter-based stock tracking service got funding in late September, and social video startup Seesmic acquired Twhirl, a micro-blogging and messaging aggregation service in April.