Kobo just released their Vox eReader a couple of days ago and I've had the chance to play with it this weekend.
It's quite heavy compared to other ereaders. I found that it's even heavier than the mighty Kindle DX. See below for a comparison to a Canadian quarter.
(As you can see, there's some nice greasy fingerprints on it). Having never played around with Android before, it's quite easy to use. After firing it up the first time, it had to update the firmware, which over wifi, takes a while. After the update, I was finally able to play with it. Checking the version info in settings revealed that it's running Android 2.3.3 atop kernel version 2.6.35.3.