I'd love to replace a few nuts and bolts on my Varsity, Nishiki, and Fujis with stainless, so I'd be real interested in a source for those bits.
One thing I have always wondered about Ti fasteners, though... It's not as strong as steel so usually you need to re-engineer a part for Ti rather than just copying the steel one. Is a standard steel stem bolt so over-engineered that you can just replace it with Ti or is there a risk of shearing the threads off?