Campy 9-speed Mirage shifters
10-speed Veloce Der
9-speed Ultegra Cas
Jtek Shiftmate (#1 I think)

Will this work?

According to Sheldon Brown, the derailleur part of the equation doesn't matter if it's 9- or 10-speeds (http://www.sheldonbrown.com/speeds.html). The Jtek Shiftmate compatibility chart (http://www.sheldonbrown.com/harris/shiftmate.html) also doesn't make any distinction between 9- and 10-speed derailleurs either, so the #1 looks right for me. Still, I've heard that the parallelogram is different between the two.

I can get Mirage derailleur in 9-speed, but I can get a good deal on the Veloce, too, and it's a slightly better model. I already have the cassette, no choice there, and I can't afford much better in the shifter category. So if the parallelogram difference is true, I'll have to find a Veloce 9-speed or go with the Mirage 9-speed derailleur, I guess.

Thanks. I'm almost decided! :)

Yup, Campy 9- and 10-speed RD's are no different from each other. Parallelogram motion is the same. You just need the shiftmate to use Campy shifters/derailler with a Shimano cassette. I assume that your rear wheel has a Shimano freehub, which is the real limiting factor in this case, determining what cassette you can run.

Sure would be a lot cleaner and less trouble in the long run if you could replace the hub shell or entire hub with a Campy compatible and run Campy 10-speed cassettes. That would also improve your ratio spacing.

Al

I'm not sure what you mean by "ratio spacing", but Shimano compatible cassettes are available in a much wider range than Campy compatible cassettes. And I'd think just rigging up the ShiftMate would be a lot less hassle and expense than messing with his rear hub. Would be less permanent too.

Yeah, I'm with juicemouse on this. Plus, Shimano hubs make for wheels with somewhat less extreme dishing than Campy hubs. Shimano-compatible cassettes are generally cheaper than Campy cassettes, too.