Looks like a japanese hacker has Qtopia (Qt for PDAs) running on his GP2X:
http://www.hackaday.com/entry/1234000610073575/

Qtopia is what powers Sharp's Zaurus line of PDAs, and a lot of other small Linux devices. Even if Sharp has been remiss in maintaining it own version up to date, there are others. And it seems that generally Qtopia runs faster and with less memory problems on equivalent hardware than less mature platforms (like, say, maemo :-).

Getting USB host mode on the GP2X is even worse than on the 770, because you have to make your own special-purpose cable ! And there is no built-in network connectivity, and of course the screen has lower resolution. Despite all this, that guy has Opera running on his console, through an USB Wifi adapter, with USB keyboard and mouse attached (yes, it has a mouse cursor too :-). No reason why there couldn't be external mass storage also. It seems that Zaurus software packages can be used more or less unchanged (viva ARM !).

My guess is that if maemo updates by Nokia don't live up to general expectations by power users soon enough, there will be something like this appearing for the 770 at some point and the platform will fragment like the Zaurus did.