If you haven't found one searching on the Web, I would recommend contacting Optoma Customer Service, and they should direct you to a source with a replacement lamp.
The Optoma EP1691 WXGA DLP Projector has an integrated laser pointer.
Yes, there ar many good reviews and ratings on this projector.
Yes; the Optoma HD33 model is capable of projecting in 3D and is available for around $1,500. It is the first 1080p 3D projector available in this low a price.
Top rated theater projection screens include the Optoma Home Theater Series HD20 1920 x 1080 DLP projector (around $1000 USD) and the Optoma Home Theater Series HD66 1280 x 720 DLP projector (around $700 USD)
The Optoma TX-700 is an extremely small portable projector that functions just as well as it's slightly larger counterparts.
It is best to use compressed air in order to clean the Optoma's color wheel to prevent doing any damage. There are tutorial videos online that you can watch and learn step-by-step.
The projector needs a new lamp?
The most popular and highest rated Sharp Projector Lamp available right now is AN-XR10LP Projector Lamp. They retail for around $300 but are currently on sale for $80 at Amazon.
"Optoma projectors can run you anywhere from $500 to over $3,000. The price range is indicative of the features you're looking for, and how advanced your knowledge and expectations of the projector are. Research should be conducted to compare the features before you purchase."
There are several great brands of smaller projector screens that you can look into. Both Da-Lite and Optoma make screens that would be great for your sons college dorm room.
A replacement projector lamp can be bought in-store at Best Buy or OfficeMax. One could also purchase them online at either of those stores or at Projector Central.