SP3 for GP10 was released today. This was a little bit of a surprise since MS had been focused on a 6 month release schedule. The good news is that I think that I can stop saying FP1/SP2 and just say SP3.
Download and Release info here.
Dynamics GP10 service Pack 3
Archived post from 2008. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.