If it's too late for a refund (or if they don't refund .ws regs - I don't know policy here since I've never reg'd a .ws), you've got the choices of just leaving it alone until drop time in a year and seeing if it sells, or asking them to drop it anyways even if you don't get a refund, or developing it. But it's only reg fee right now and you haven't spent a lot of time and energy, so I wouldn't recommend throwing a lot of time into dev'ing it unless you're really interested in that. Cut your losses as lessons learned, unless, like I said, you're totally into xbox and into dev'ing a site around it. If so, then you can't lose because you're doing it out of fun/interest.