Sony also revealed that Epson plans to release a pair of new printers designed to work with GT4 in Japan this winter. The PX-G820 and PX-G920 will support 5,760 by 1,440 dpi resolution, with six and eight-colour printing processes respectively. Both printers will connect to the PS2 via USB port and GT4 should automatically recognise them. They won't be the only options of course, but for now it's not clear which other printers will be recognised.
GTXLRI saw a post on a japenese site that showed a list of GT4 Epson compatible printers, The list was quite extensive, and mine appeared on the list (830), so im happy.
Im sure PD will build in a lot of printers, aslong as they are capable of reasonable colour picture images.