Microsoft Eyeing Bungie Re-Acquisition?

The latest episode of GamesBeat Decides includes indications that Microsoft is in talks to re-acquire Bungie, the studio they owned until 2007. More recently Bungie was an Activision possession, but they regained their independence from them last year. reports on this saying they can independently corroborate the story, saying the companies are dickering over a price tag:
Speaking on the GamesBeat podcast, Venturebeat's Jeff Grubb said he had heard Microsoft and Bungie had been in discussions - although the two companies had not been able to agree on a sale price.

I've independently heard these talks have taken place, driven on Bungie's side by a desire to raise new funds for the studio, its projects and staff.