Already optimized for vector graphics, prgrammable with something free like ponyprog, and 25$ each. two 12 bit dacs and a blanking output
See:
http://www.sparkfun.com/commerce/pro...oducts_id=8488
and
http://www.dutchtronix.com/ScopeClock.htm
of course we would need to slow things down for galvos, but....
A dac for 25$ is intreging, even if we have to add ram to it.
OK, so its best for making a test pattern generator or something, but hey, its cheap, and its a finished product available from 3 suppliers.
I ordered one.
Steve Roberts