I need to purchase a projector for a website demonstration. We need one that is Mac and PC compatible.  Is this something you can help us with?  Do you sell them?  Can you help us set it up?  Which model do you like?  We don't know anything about this.
Thank you so much!
___________

I don't sell any products.  But to answer your other questions...any DVI enabled LCD projector will be fine.  It's not a matter of computer compatible but rather what connectors are involved.  The most common video output is DVI although many Apple computers require an adaptor like mini-DVI to DVI or the new display port to DVI adaptor.  It just depends on the computer.  I would be happy to assist you setting it up.  You're going to want to consider price and quality.  You can buy a decent projector for around $500 and pay less if you want less quality.  

Generally you're paying more for a brighter bulb, a higher resolution and more connection features.  I don't have a personal favorite but I think overall, budget will be the largest factor.  I would strongly suggest checking here first to get your feet wet.  Newegg.com - lcd projector
Scotty