Google Wave Extension Gallery goes live, still very wet around the ears
Until now, it's always been a bit tricky to find 'proper' extensions for Wave. There have been a few lists, but gadgets are often plagued with stability issues (or they don't work at all), and robots are prone to go offline without warning. With this official Gallery, and the necessity for all submitted extensions to be reviewed by the Wave team, the quality of extensions will surely improve.
In other news, there's also a new Robot API, if you're a developer -- it's been awfully quiet on the Wave front, but I have a feeling there's still quite a lot going on behind the scenes.
Anyway, if one of the 18 currently-available extensions (yes, there aren't many yet -- no doubt they're being reviewed as we speak) aren't what you're looking for, don't forget to check Download Squad's ultimate list of Wave robots, or alternatively our gadgets list.