Oh yes. Widgets are taking over the Web 2.0 world, as any fule kno, so what better than a website cataloguing every single widget available: including those for your desktop and web browser?
Widgipedia is that site – I like what they've done with the name there – and it's already a comprehensive database of widgety goodness, along with developer forums and technical info if you're actually making widgets yourself, rather than just filling up your computer with them.
No mobile stuff in there yet, although hopefully Nokia's WidSets will make it in sooner rather than later.