I've had some requests to follow up on my experiences with this combination so here are my comments. Please note that this is my first experience with front projection. Here is a picture of the screen within my HT:
http://iacl.ece.jhu.edu/~pham/screen.jpg
The screen fits nicely between my component rack and RP display and it is fairly convenient to switch between the two. The screen is fairly easy to pull up, but care must be taken when pushing it down, as the mechanism usually needs some manual help to roll down the screen properly. When upright the main problem is that the "tensionining" provided by the hydraulic scissors in the back is fairly low and concentrated in the center, resulting in some sagging on the sides. Away from the sides, it stays reasonably flat and I've had no problems with wrinkles so far. Here's a screenshot of the 3-D fish screensaver:
http://iacl.ece.jhu.edu/~pham/fish_small.jpg
I've found the image produced to already be quite good although I haven't calibrated with Avia yet. Contrast is much better than my LCD RP display. Brightness is very good with low levels of ambient light. The "wide power" material boasts a wide viewing angle and I've found this to be true- minimal variation in brightness and contrast when you move to the sides. I do see rainbows once in awhile using HDTV, HTPC, or progressive dvd, mostly in bright scenes or bright parts of the picture. I also see more rainbows when not sitting directly in front of the screen.
Overall, it doesn't bother me too much and if I'm focussed on the movie, I generally don't see them at all.
I can post more pictures if people are interested.