The Pbwiki team have announced some new innovations - see below. I was beginning to think that wiki's were a bit of a flash in a pan but if these sorts of innovations keep coming I think they will begin to catch up with blogs as an alternative way of working together and communicating.
From the PBWiki mailing -
Now check this out. There are 5 new features for your wiki that you can
insert today -- free.
1. Spreadsheets for your PBwiki
2. Voice chat (talk to others viewing your wiki using your voice)
3. A shared calendar (perfect for scheduling with your group)
4. Upload video (no storage space used!)
5. Plan an event--even sell tickets--using a new plugin