While neither Google nor any ODMs have seriously confirmed any Android 2.2/Froyo updates (except from Google for its very own Nexus One which was much expectable), with today's press release, Adobe has spilled some beans which Android smartphones will - most likely - get the Froyo update. In its press release about today's Flash Player 10.1 for Mobile launch, Adobe named the Dell Streak, Google Nexus One, HTC EVO, HTC Desire, HTC Incredible, DROID by Motorola, Motorola Milestone, Samsung Galaxy S. While other devices are yet not explicitly mentioned, this is already an impressive list of smartphones which might get Google latest Android mobile OS.
As mentioned, there are yet no official information or release dates available about the expected Froyo updates for the HTC, Motorola and Samsung smartphones.
UPDATE: German ZDNet.de received an information, that HTC plans to release an Android 2.2/Froyo OTA update for the HTC Desire and HTC Legend (which wasn't mentioned by Adobe above) soon. While the company hasn't given an exact date, ZDNet.de said that the roll-out is planned to start within the next two weeks!
Cheers ~ Arne