If you like acoustic blues, do yourself a favour and check out Scott Ainslie. Theres some of his stuff on YouTube and his website is
http://cattailmusic.com/
He plays a lot in the style of Robert Johnson and if you are interested in blues history you'll find some awesome articles on his website.
Let me know what you guys think, also, if you have a few acoustic blues favourite, post them here for the rest of us...