I had a look on Blues Guitar Unleashed. I have no axe to grind but if you like that you might very much like Matt Schofield's stuff on truefire and it's rather differently put together. It has Intro - Show and Explain - break it down - with the added benfits of being able to slow it down to your pace and the tabs etc are there - and then play along and trade solos etc.

It's rather well resourced. By all means if there's better then I'm happy. This current will keep me going for a year.

It's a bit like this with Automated tab which is not very folky but it is rooted in blues :) And sometimes my eyes, ears and fingers don't always pick up the nuances of what people do. And sometimes to be able to see AND have a tab until you get over the next hill is useful. Well it is to me. Too many plateaus and too few hills climbed - the definition of middle/old aged angst