Oh yeah, now everyone jumps in!
Thanks for the link Pedullist I'll check that one out too.
Spinsta, I saw you reccommended
the Orange vocoder on another thread. It's like $150 though! I want a cheaper solution, I found 1 or 2 free ones, and Voice Tweaker looks like a free trial.
I also read somewhere that the little digitech vocal pedal board has a "robot" effect. They seem to be sold everywhere so I'll probably try one out, those can be had for under $200 now, so I think if I'm going to shell out that kind of dough, I may go for hardware, and that thing might have some useful live applications too.
Moskus, I'm still using Sonar 2- I'll post back if I get Voice Tweaker working (unless Pedullist beats me to it).
Thanks again for the replies everyone.