Bought a Nokia N900 last week and running Debian on it. Once you do a few tweaks to fix the battery life and performance, it's brilliant. How sad is it though, that despite being almost five years old, it's still one of the most open, hackable phones around. Switching from Android to the N900 felt like what switching from Windows to Linux felt like - like I have maximum control over the device, with the freedom to modify anything (relatively) easily.