Here's my suggestion -- take from it what you want.
Put a search function on the website.
The reason I suggest putting a search function (an advanced one) is that you could maybe search for which tuning that you would want -- so you could learn all the songs in that particular tuning without the hassle of switching between tunings .. and I am aware that dave doesn't screw around with the tuning that much -- but he does a little.
This would be pretty straight forward if you have it set up as a database...
Other comment -- I really like the layout of your site -- very fresh (been obsessing over layout as i am setting up my own site - not about dave though

Anyways -- since this is the forum for suggestions and i hate switching between tunings...
Now if only on the giant tab sites they did that (or if there is one .. point me in that route)
Keep up the sweetness
peace
jb