Adobe is in the midst of their Android Summit, and already, two big announcements have come out. The first is that Adobe's AIR platform will be out to all product lines in quarter four of this year. It is unclear whether this will hit devices running 2.1, but certainly it will be on 2.2.
Adobe's description of AIR is:
The launch will occur when AIR is upgraded to 2.5.
Adobe also announced that Nexus One users running Froyo 2.2 can update their Adobe Flash applications in the market to a final release candidate from the beta that they had earlier.