Just browsing on Youtube and found these projects.
This guy is really into DIY! Lots of very good ideas to think about.
http://www.youtube.com/watch?v=2NAlyq0Rf20
And another approach to digital setting circles, connected to Stellarium.
http://www.youtube.com/watch?v=2eTR0QFh6kw
Haven't done anything with my dob for a while...
Cheers
Chris