No suggestions, but one piece of advice:
Unless you're going to buy a CRT-based projector (advice about this at the bottom), you're first thing to look at should be native resolution. What you plan on doing with it should play a huge part in what native resolution you want and by extensions which projector you buy.
If you're big into HDTV, got the digital cable box and whatnot, and you watch 720p content a lot, find a projector with a native resolution of 1280x720. To be honest, I'm not sure if there are projectors with a resolution that high, look for native widescreen projectors and go from there.
If you just watch regular, non-widescreen TV and DVDs or if you want to play console games and have them look decent, you want a 640x480 projector, or some factor of it like 1280x960.
Just remember, if you're going to be using a HTPC as well, don't let that lull you into buying whatever projector you find first - you can tailor the output of the HTPC to fit whatever native resolution your projector supports. You can't do that with digital cable boxes or game consoles.
CRT-based projectors are a special beast. They don't have a native resolution, or have an infinite range of them depending on how you look at it. At any rate, they look awesome at any resolution just like CRT-based monitors. But, because of how they operate, they are severly prone to burn-in. In this day and age, I can't recommend a CRT-based projector unless you're always going to be showing something like DVD content, without ever stopping on menus or anything like that. Even live TV would have operator logos (NBC, ABC, TNT, etc.) that would burn into the tubes quickly.