Where's the beef?
Yahoo Widgets is a collection of functionality that are smaller than applications (applets??) and bigger than a snippet. There are thousands of them, kind of like tribbles, and I played around with the pretty little doodads over the weekend. On the one hand there are some very clever and elegant tools out there but as of today I don't see the killer application.
Not to mention installing them changed the behavior of my computer -- definitely not cool.
Worth checking out and following.