2.0 is pretty much a dead branch. 3.0 is our live trunk which is also used for current products, so it's much easier to justify working on it. When we have released our seven new products we'll be able to find the time to merge the 2.0 fixes to 3.0, fix the problems that alpha testers have found (such as the disk never spinning down), and release that as Beta. Then we can address bugs in 3.0.
Nobody has ever succeeded in squashing RDS bugs, though. Maybe it's a black art. We certainly put a lot of effort into it for 2.0 are were incredibly disappointed that it was still broken.
Rob