Peter Marks organised a BOF (Birds of a feather) session on Category Theory at Spa2008. To my surprise about twelve of us turned up. We discovered a shared intuition (bizarre though it seems) that Category Theory will somehow shape the next big thing in application development. Less surprisingly, we also discovered a common enthusiasm for Haskell.
We want to build on this. Most of us are based in London, or can reach it easily. We plan to meet regularly (about once a month) to explore these ideas and to help each other to learn.
I'll post more about this as soon as we have a date and location for our first meeting.