How about an extention of DrScheme allowing some really awesome livecoding? Fluxus gives you the entire REPL as well as an editor and the program runs and displays the graphic with a press of F5, this is how I first got into Scheme.<p><a href="http://www.pawfal.org/fluxus/" rel="nofollow">http://www.pawfal.org/fluxus/</a>