An SLR will give you the best results and the most flexability. You will also be able to add lenses if you decide to get more fancy.
Consumer versions of SLR digi cams arn't too expensive. The downside is that they are large.
What you want is a camera that does well in lower light (typical for build shots) and one that is at least 5mp.
Canon makes some nice units. I have a small back-up camera called a G3 -- it's great for tech photos and lower light. You can find they used for cheap.
http://www.dpreview.com/reviews/canong3/
I think this is a smoking deal..
http://www.adorama.com/ICAA540R.html
This one is more money.. it's the newest version of my G3:
http://www.adorama.com/ICAG7R.html
If you decide on getting an SLR type let me know and I will help you. I also might be selling my 20D soon to upgrade to a 5D.
Steven
__________________
"A ship in port is safe, but that's not what ships are built for."
See Bad Penny run the cones:
https://www.youtube.com/watch?v=8GUPPIX-92U
1971 Chevelle Wagon - Roadster Shop Chassis ProCharged Shafiroff LS and lots of yada yada
1968 Camaro - Project Track Rat - 440 RHS LS