Donker,
For what it's worth, that 24 month rule isn't as strict as it seems. I've got a package in for this November's board, even though my 2 year mark is in december. The CEC Accessions O said it wasn't a big deal, and that ENS's have applied before.
The tricky part is with your command, notifying your DH, XO, CO that you want to lat transfer. If they're on board, it's no problem. You sound like you've only been in a short time, so that might be trickier. If I were you, I'd go ahead and take a stab at the May/June 2005 board, what's the worst that could happen? They say no? Then you're right where you were anyway.