I'm using Android 1.1 on an HTC Kaiser (aka the Tilt, the Vario III depending on who you got it from). This is a Windows Mobile phone that Android is being ported to.
Not all the hardware on the phone is supported by the Linux kernel but that situation improves week by week. I spend most of my time in Android, only booting back to Windows when I need to load TomTom or upgrade my Linux kernel.
More information can be found here:
http://forum.xda-developers.com/showthread.php?p=3629317
I'd really like to upgrade my phone 'cos there're better ones on the market now. The trouble is I'm quite used to having both windows and linux on my phone and there's precious few phones out there that'll do that.
UNIX is hot. It's more than hot. It's steaming. It's quicksilver lightning with a laserbeam kicker. -- Michael Jay Tucker