Adobe AIR checkpoint/snapshot
Adobe released the public beta of its Adobe AIR runtime environment (previously codenamed Apollo) about a month ago. The software is designed to allow the development of rich Internet applications that work on any operating system. I'm sure that there are technical differences, but it seems a lot like an amped-up widget engine to me.
Needless to say, AIR apps aren't nearly as ubiquitous as Adobe Flash apps (yet), but there have been a few interesting recent developments. The most-polished AIR application so far is Adobe Digital Editions, software for reading, downloading, and managing e-books. To learn more about it, check Seth Rosenblatt's First Look video for Adobe Digital Editions.