i just picked up my 2480 after having had the fix done. haven't even turned on the recorder yet, but (assuming the repair was done correctly!) i highly recommend Triple S Electronics in Bloomfield (i dealt with Karl).
after contacting them by phone, all i had to do was fax them my original receipt and the page from the official Roland site about the distortion problem. Triple S then ordered the Jack Board from Roland. When they received the part they called me, I brought the 2480 into the shop, and it was ready later the next day. very cool. professional. cooperative. minimum down time... unfortunately, not all shops are willing to work this way.