With the inclusion of Balsamiq Mockups we would have a great tool to build an interaction patterns library. Should we start one?
I would really like to have one, that can be easily extended. A lot of the current libraries feel to static to me and often don't have the right granularity. It would be awesome to have common problems and find different solutions to it. This way, lots of questions could be answered by referring to the right interaction patterns.
We could then start to create a new tag interaction-pattern. Make it a community wiki, where one could post examples. Answers could be alternatives or better implementations of the mentioned pattern.