The current projector is a Canon LV-7295 2600 Lumens XGA projector purchased for $369.95 from B&H Photo on 7/26/2012.
The projector was purchased using the ProjectorCentral website to find projectors with the correct zoom.
The screen was built by Tony Ro and MSB in 2005. The screen size is 43" wide by 36" high (diagonal ~60"). The distance from the projector to the screen is approx 330 cm (this might be the distance between the two screen positions).