Enterprise Search group on LinkedIn
There is a relatively active Enterprise Search Engine professional group over on LinkedIn - you might consider joining the group if you're there. The discussions have been about Open Source technology, visual search, Microsoft and FAST, federated search and more.
It's interesting that so many 'enterprise search' groups have grown so much in the last year or two including searchdev.org - I guess it reflects both the fact that it's finally being recognized as a mission-critical capability and that there is so few places to go for information. Hopefully we'll see even more discussion and user participation in the coming year!