"Smith & Wesson also makes/has made a few models chambered in 9mm."
As well as the Blackhawk interchangeables, Ruger also made some in the Security Six, Police Service Six, and Speedsix models. I may be wrong, but I think there have been some in their LCR, SP101, and GP100 models also.
Myron
How many peckers can a Pecker Checker check if a Pecker Checker could check peckers? (stolen from shootinurse)