Some airport sites.

[wildcat400]

Not sure if you guys have seen these before.
http://www.pilotoutlook.com/airport/dosearch

and

http://www.airnav.com/airports/
I like airnav the best as it has pretty much everything that you could ask for.

 

[Craig Taylor]

This is another handy site.
http://gc.kls2.com/