Epson released new 2200 drivers on 11/25/09 (driver 8.1.2), which states compatibility for 10.6. You may also need to install the common updater which also lists 10.6, although it was released quite some time ago so most have probably already installed this.
Wow!! But I'm living on the wrong side off the ocean and have a 2100 which is in essence the same as the 2200. The last update for the 2100 is v.3.09 from 05-Nov-2007. No recent update except for some hopeless Gutenprint driver were you cannot even switch printer colormanagement off!! There is simply no checkbox for this. So if I have to print I switch back to CS3.