Well, after a short period of uncertainty, and me shitting bricks that they wouldn't get picked up, Harmonix have at last confirmed that the sale of the company has gone through.
It looks like the company has indeed gone back to....Harmonix themselves. The listing from the Viacom website states that "Viacom Inc. (NYSE: VIA and VIA.B) announced today that it has sold Harmonix Music Systems to Harmonix-SBE Holdings LLC, an affiliate of Columbus Nova, LLC."
And just gone up on the Rock band forums is a statement from Harmonix dev HMXJohnD, Which says:
We’re happy to confirm the news today that the sale of the company is complete. We appreciate all of your support, comments and warm wishes in the preceding few weeks.
Viacom and MTV Networks have been an amazing home for us over the past 4 years. It’s where we launched both Rock Band and Dance Central, worked with The Beatles, Green Day, AC/DC, The Who and thousands of other artists. We want to take a moment to thank everyone in that organization who helped make these awesome games possible.
We’re excited to be returning to our roots as an independent and privately owned studio. As for what it means for you, the DLC schedule marches on for Rock Band, we will continue our support of previously released titles and we’re hard at work on some unannounced projects that we think you’re going to be pumped about.
Thanks for your continued support and stay tuned for more information here on RockBand.com".
Brilliant news, i'm sure you will all agree.