Lots of information about snoring and sleep apnea.
   http://www.quietsleep.com/

Great site with advice about insomnia, jetlag, etc.
   http://www.shuteye.com/

The Association for the study of dreams
   http://www.asdreams.org/

Huge resource of sleep and comfort articles and tips
   http://www.sleepnet.com

Simple solutions to help you sleep better
   http://www.shuteye.com/solutions_promote.asp

Sleepnet discussion forums
   http://sleepnet.com/wwwboard/wwwboard.html

The better sleep council
   http://www.bettersleep.org/

The better sleep guide
  http://www.bettersleep.org/OnBetterSleep/download_guide.asp