I came across iwastesomuchtime.com while wasting time, and now I am more efficient at wasting time!
Also stumbled across http://thedoghousediaries.com and after starting at the beginning of their archive and working my way up for some time, I happened upon this rather addictive link:
http://tonematrix.audiotool.com/
I apologize in advance for the internetting you’ll be doing from now on.