Apple's Official Logic Pro Page
Apple's Official Logic Express Page
A Yahoo Group for the LUG (Logic Users Group)
The LUG Home Page
Swiftkick - some Logic enviroments
Big Blue Lounge - Great music forums including one dedicated to Logic
Macmusic.org - site about making music on a Mac
Home Audio Journal - great exploration of Logic
Pete Yandell's collection of OS X Audio Links
Logic Pro Help A very good forum with Tips, News, File exchange and more.
Celemony : Makers of Melodyne - a very impressive pitch/time shifting plugin.
Crystal Soft Synth
Roger Nichols Digital
Super Destroy FX
More Feedback Machine
Natural Studio - home of the ns_kit