Just to add my 2c:

1. Flashed with Bleb's GUI front end to the OS X 770 flasher (on an intel Mac)
2. YouTube is now almost watch-able.
3. Media Player video play back is now much improved. Re-encoded an episode of Prison Break to 400x240 600kbps and it was flawless.
4. I never changed the default power saving settings, now "Lock Touch screen and keys" blacks the screen and only responds to the power button (this is how I thought it should work)

Still, no SDHC which means I still ain't buying a flash card