Smelly Monkey's Burrito Journal is kind of a work in progress, but it does have a cool assortment of burrito shop reviews from all over. There are some glaring omissions -- the SF Bay Area seems hardly covered at all -- but depending on where you live, it might be useful. Smelly Monkey is very polite in e-mail, and is advertising this site on Google, so maybe some of the blank spots will get filled in pretty soon.