Here Myka, check out these pages:
http://reefkeeping.com/issues/2007-11/totm/index.php
http://www.canreef.com/vbulletin/showthread.php?t=30974
http://www.reefcentral.com/forums/sh...hreadid=686757
*Somewhere* in there is some details about his self-squeegee'ing skimmer head, and some videos too IIRC.
Also, there are some skimmers which employ a spray head which spray down the skimmer neck in an effort to keep it clean. And, I think there are a couple commercial versions of self-cleaning skimmers (Deltec, I think), although they tend to be pretty high-end things.