Here's what I've got:
For all sites with the word 'game' in their names, the 'g' is replaced by an 'l'. i.e. GameSpot becomes LameSpot, GameSpy becomes LameSpy, etc. That takes care of 90% of gaming websites.
Eurogamer is an exception: it becomes Euroidiot.
Shmups.com becomes Shmucks.com.
Famitsu becomes Fanitsu.
Etc. etc.
Note that from now on all these sites will be referred to using their alternate names on Insomnia. So help me come up with more of those.
For example I could really use alternate names for Kotaku, Joystiq and Siliconera right now...