Your service looks interesting, a couple of questions though...
1) If I want to move a few sites to host with you, can I just change the nameserver settings where my domain names are currently parked (preferred) or do you need me to actually transfer the domains themselves (hassle)?
2) As I have existing sites I don't need the free domain name yet, so could I keep the credit and register another domain name later when I need it?
Thanks,
T32.