How We Did It: Meet Rexamus - Meet Rexamus, IDEO London’s friendly resident dinosaur. You see, unlike his terrifying cousins in Jurassic World, Rexamus is programmed to embody one of ID...
#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.