Staying up-to-date just got a little easier.  CNet launched a new service that scans your PC and checks your installed programs to see if updates are available to you.

I tried TechTracker and found it to be fast, accurate and helpful.  They are coming out with a Mac version soon.  Here is an example screenshot showing what it alerted me to update.

Other Info:

I use a few other services, like this, that are worth a look also.

• Here is a link to Secunia's Security Vulnerability and Patch Scan;
• Here is a link to VersionTracker, a driver update service.