Tools We Like: Spotlight on IDEO’s EE Lab - Mark Harrison has been building stuff at IDEO for more than 15 years (see Mark’s post on his all-time favorite workarounds). He’s one of the most knowledge...
#1 MerbCamp - Yes, all merbists have seen it.
#2 Merbunity - It's maintained by hassox!
#3 Atlanta ruby user - I found this site recently. I think it's worth to see.
#4 Merb Dependencies and Bundler - by
#5 peepcode (well, not free. but it's 9$) - The screencast was recorded on merb 0.9 but it still is a good one.
And there are good tutorials.