Read my english blog at dotmad.net
Twitter - I'm using Twhirl and I'm happy with it. I noticed some update problems today, but now I noticed that twitter is having some issues so maybe it's not twhirl's fault.
RSS/Facebook - I use Flog and it seems to do the job.
I used Flog and it stopped working also sometime during TechEd.
When you find a new useful tool let me know :)
Currently "Simply RSS" seems to be doing the job fine (I chose it based on users count, nothing else).