I've thought about doing this as well -
Use a MIDI host (such as Cakewalk Sonar or some other DAW workstation package) that supports tracks for MIDI OUT.
Send the MIDI commands to Showtime LIVE, LivePRO, QuickShow, or other MIDI-enabled laser software.
If you use MIDI software clients such as "MIDI YOKE" and "MIDI over LAN", you can even pull this off without the need for external MIDI interfaces, even if you're running your MIDI software and Laser software on separate computers.
RR
Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
1979.
Sweet.....