You've probably heard about a hard-to-get, hugely new service called Google Wave. Lest ye forget, there are plenty of web-based collaboration tools that don't require learning a new way of speaking. Here are a few of our (mostly free) favorites.
This email-organizing service is openly pitching itself to those left out of the first round of Wave preview accounts, and not entirely without reason. It doesn't do half the things that Wave claims to do, but it does free your coworkers from having to read through freakishly long "RE: FWD: FWD:" letters just to understand what the original question or discussion was. Add CC:Betty to your cc: list on a topic you want to get started, and the webapp does the work of organizing each person's contributions, different attachment types, chronology, and who's been left out of the chain. Even if everybody doesn't bother to check in at the Betty page for the discussion, the person trying to make sense of it all will be glad they can do so. (Original post)