Just wanted to give y'all an update I purchased this all in one printer yesterday from Staples ($59) and have been putting it through the paces ever since, hope I'm not wearing out the scannner ;-)
Anyway... it prints fine on transparencies. In order to print on transparencies you need to go into prefernaces and click on glossy photo paper, I also backed mine with a piece of typing paper which may or may not have been overkill?
Just thought everyone would like to know, I'm off to print on tyvek now. The only thing I have against this machine is it doesn't have a rear feed as well, if it did it'd be perfect.