Version Tracker
The #1 Resource for Macintosh Software
http://www.versiontracker.com/

MacNN
For All of Your Macintosh News!
http://www.macnn.com/

MacinTouch
Another Macintosh New Site.
http://www.macintouch.com/

MacFixit
Troubleshooting Solutions for your Mac
http://www.macfixit.com/

MacCentral
Mac News Site
http://maccentral.macworld.com/

MacSurfer
Links to articles on a variety of sites.
http://www.macsurfer.com/