DADF#AD can be really nifty for slide and bottleneck blues. Try it with a slide on your little finger. Richie Havens got famous with this tuning as well. If you are just getting into alternate tunings, stick with drop D for openers. Drop you low E to D and alternate strings 6 and 4 with your thumb while fooling around in normal D on the high strings. You will find lots of neat stuff there.