A small tool called ShadowKiller by Unsanity is out. It totally removes shadows from MacOS X while the application is running, including window and menu shadows. ShadowKiller is freeeware. Grab it now and send us your ideas for other MacOS X hacks!
Get ShadowKiller
Mac OS X Hints
http://hints.macworld.com/article.php?story=20011010045419962