Same here, got it today, opened it and turned it on (after plugging it in for 20 minutes because the battery was 100% dead) and it went to the main screen (no boot up questions?!?!?!). Well it had clockworkMod and the update.zip already on the internal sdcard, along with a bunch of other files. Tried to install them anyways and when I press and hold the power and vol + buttons, the screens starts up then goes black. So it looks like this IS NOT A NEW UNIT, but one that someone has already messed with. Makes me wonder
I also noticed that the volume button is backwards, (+ lowers volume and - raises) so if you are trying to install clockworkmod, first reformat everything, xfer the clockworkmod files, then when you boot up, press volume down and power. Worked perfectly for me.