Well some demo models have even reached these lowlands of NW Europe (since Saturday) ....
I was so lucky to be able to play (shortly) with a Single 1.6 GHz G5. It had 1.25 GB RAM and the GeForce FX 5200 grfx card. It is BEAUTIFUL! WOW, you can look right through it, staring from the front. It's pretty quiet, and feels "snappy"! Not too different from my Dual 1.25 w/. Radeon 9800.
I like the Optical Drive door.... cool!