Most helpful cnet.com user reviews about Norton Internet Security 2010:

1. Best security suite for all the AV haters
2. Norton Internet Security 2010 is fast
3. Good product, but the whole package expires
4. Definitely worth upgrade and free if NIS has not expird
5. Works well on XP, XP PRO & Vista
6. Not worth the money even if it was free
7. Its Way better than its predecessors
8. A very nice, worthy security suite
9. Average product
10. Great Product

The new Norton AntiVirus 2011 and Norton Internet Security 2011 beta products include several new and improved features which I'm going to detail here:

Reputation Scan:
In our 2009 products, we introduced Norton Insight which dramatically improved performance by not scanning known good files. In 2010 products, we went one step further by using reputation data to mark files as good, bad or unknown.

With 2011, we are enhancing this even more by providing fine-grained reputation information about files and by allowing users to perform a Reputation Scan of their files. You can choose to do a quick or full scan or a custom scan of a folder or a drive. Once the scan is done, you will see how your files are rated based on their Trust Levels, Age and Prevalence. Reputation Scan will also compare your results against the rest of the Norton Community. It is an excellent tool to give you an idea of your machine’s risk profile.