I also am looking for project examples on how to make an Arduino vacuum robot.
I've been looking around on the forums for some time now, and all I can find is other people looking for the answer to the same questions I have. If any of the "Pros" could help me, (or us) that would be Super!
Delta_G:
If you don't want to have to put in any of the thought and just want something to assemble, buy a Roomba and take it apart and put it back together again. Will be cheaper and much less frustration in the end.
That is exactly what I was thinking to suggest! However, I believe Roomba is too expensive for these experiments...