A few weeks ago I put in some long hours at work, so as a 'thank you' they got me a Kindle Fire.
I wasn't too hip on the stock firmware that came with it, so I rooted it and installed Cyanogenmod 7.
I'm loving it, now. It's pretty snappy, and I've been able to get OpenVPN set up, so I can hop on the wireless at work and not have everyone sniffing my traffic.
I've been away from Android for a few years, now, so I was curious about how far it's progressed. Some things look very similar (the plain config screens, for example) and some things are much improved (the bootloaders and launchers).
Overall, I like what I see. I'm excited for the Google Tablet to come out this summer so that I can compare.