Oh yeah! I just turned in my order for a dual 2GHz G5 with 4GB of PC3200 DDR400 SDRAM, and a very quick and fast external SCSI eight drive array on an ATTO UL3D, all cabled for dual channel 160MB/sec. Hoo. Hoo. Hoo. Hoo.
(320MB/sec and the UL4D still isn't ready for prime time, my sources tell me.)