Here is a sweet article giving a good overview of the video game patent field. It focuses on video game method patents mostly, which, are frankly, the most interesting. Check it out:
Top Ten Video Game Patents
The AVG patent at dispute is not on the list, probably because it is not a pure video game method patent. It could go down as the patent that most affects the industry to date...although that Immersion v. Sony patent suit cost Sony a pretty, pretty penny.