Just in case you all haven't seen this before (or haven't thought about it). I was thinking that since it seems like lots of prototype boards are being made perhaps a prototype circuit board printer like the following might be useful for prototyping some of the simpler support boards (e.g. some of the laptop PCBs).
I'm not exactly sure how much cheaper (if any) that it would be compared to getting prototype boards printed up by another company but, I could imagine that being able to print up your own circuit boards would probably help speed up the design/prototype iteration cycle.
-Mike