I would really love to see some blues slide guitar lessons on here. It's such a distinctive and soulful style. For those of you who aren't familiar with it, just type in "blues slide guitar" in youtube and you'll get thousands of great videos. Here's a few that I really like:
http://www.youtube.com/watch?v=OUi9-jqq_i0
http://www.youtube.com/watch?v=ok6mktRrD0Y
http://www.youtube.com/watch?v=S_EtkdY45L0
I think Ivan (once he finishes his Delta Blues Workshop, of course or David Wallimann would do a great job at this, since they have the blues coursing through their veins, but anyone else is welcome to give it a shot. Come on guys, what do you think?