That's the Special Projects office at DirecTV which handles DirecTivo and UTV accounts and support. Frankly, I'd NOT call this number for normal programming issues, but only use it when you have a PVR issue.
Also, it closes at midnight eastern and calls are routed to the normal CSRs at DirecTV. It's a good number to have, but don't abuse it. Otherwise, DirecTV may have to shut off direct access and force us to go through the front line CSRs.