Congratulations on your purchase of this miracle Lytro. The technique looks very promising and I expect some very spectacular developments in this area. The camera itself looks great, very 'Apple'-like and it really seems to be a gadget that will find its way to the greater public.
I was also pre-registered for purchase but living in Europe I was not allowed to order one - which doesn't bother me too much, because I wasn't going to do that anyway, having the following considerations:
1. The output is not jpg or raw, but an interactive proprietary Lytro format, which can't be printed but only viewed on screen.
2. The software only runs on a Mac and I have Windows.
3. Nowhere in the published docs are any detailed specifications about the shutter speed range, sensor dimension, sensitivity range, pixel equivalent count for their megarays (although in the comments they seem to have clarified that the resolution goal is 1080p), min or max field angle of the 8x optical zoom or the battery capacity.
4. The price increase of $100 for the added 8 GB I find rather steep.
5. I'm not sure, but I believe to have understood that the photos must be stored at Lytro, not on your own hardware.
Basically, I prefer to wait a little to see the future developments. Still, it would be interesting to hear from your experiences once the camera has been delivered!
Best,
Johan