All AMD will say is "2011" for Bulldozer - best guess is 2nd half of the year since it is the server version that will be released first, desktop to follow later.
Sandy Bridge "mainstream" desktop CPUs are supposed to ship early next year - January maybe - and the "performance/extreme" or socket 2011 versions in Q2 of next year. Intel is being kind of closed-mouthed about the latter - I guess they don't wanna hurt their i7-980X sales .
I read an article some where about a Q2 2011 release date for the AM3+ boards which are required for Bulldozer, so we won't see Bulldozer before April, and who knows how long after that. Llano is also pushed back to Q3 2011 now.
I gotta get ready for work, I'll try and find the articles tonight.