Steve - I think the phone number takes you to Epson's main tech center in Long Beach, CA. The person I spoke with there wanted to be helpful but insisted on protocol - that I send the body to a local service center. I agree with Rich - you must not do this! There are two near me and when I contacted both they were totally clueless.
If you are after-hours Pacific coast or the call center there is loaded up, the number rolls over to a "help" center in Mumbai. Don't waste your time or theirs - just hang up.
Edward Felcher was sufficiently persistent with someone in Long Beach to get a direct contact at the Indiana service center. I don't recall if he posted the information.
I searched the other threads and sent out a couple PMs - Steven Choi's name was mentionied more than once as a satisfactory alternative to Epson service for out-of-warranty work. I have not corresponded with Don (DAG) about work on the R-D1.
Search the R-D1 forum for "shutter" and you may turn up a self-help fix. I recall seeing that a dead battery or a problematic SD card could freeze the shutter, and perhaps also that a firmware reset could thaw the troublesome part.
Best of luck - John