nice link - good old wiki. bottom line, there are three main technologies:
TN - mass market LCD displays; low cost, least viewing angle, and refresh times are fastest
IPS - higher end/cost (fewest models available), best resolution, color, and viewing angle, but refresh times are longer
VA - midrange cost, better resolution/color/viewing angle than TN, but refresh rates tend to be the longest (also reports of video input lag; disastrous for gamers!)
if you're concerned mainly about gaming, then TN is the way to go for the fast refresh rate and you're only worried about viewing it dead on by a single person. IPS are for graphics work and can easily cost twice as much as TN. You can get a lot more monitor (screen size, refresh rate, contrast ratio, features) for your dollar with TN, which is why it's still so popular.