Flight Price Watcher?

[D-Bone]

Hey dudes, do any of you guys know of a good site/software that can track or watch for flight prices? I want to basically put in the dates and locations of when I need to fly and then it continues to check all airlines for the lowest priced flights. I know some sites will send out emails or whatnot but I don't feel like signing up for all their spam lists. Other than that, which site is your guys top choice for booking flights? Its been a while since I have, so I'm sure there some new ones out there that kick ass. Thanks!

[Malice]

I usually use expedia or orbitz. Sometimes one is cheaper than another but usually they close. Sometimes cheaptickets is good also.

[spawnman]

If you don't mind when you go, as far as the time of day, I have gotten really good deals on Priceline. Going to Oregon in May and bought my tickets there. Save close to $100 on each ticket. Name your own price rules!