I bought a Q1 Ultra on ebay last fall. And then I promptly installed Ubuntu-UMPC on it. I forget which exact CPU it has ... it's faster/newer than a Pentium-M though (I think it's 800MHz, but it might be in the 1GHz range), 1GB RAM, and the 60GB HDD.

In some ways, it's like a giant N800, but with split-thumb keyboards, and some quirks.

The resolution on the Q1U is 1024x600, on a 7" screen, which I like. But the dpad isn't mapped as a arrow in Ubuntu-UMPC for some reason. It's used for certain function keys. Instead, the mouse/joystick knob is mapped as a mouse/dpad (in one mode, it's a mouse, in the other mode it's a dpad). It took me a while to figure that out, though.

My main frustrations have been:
1) Ubuntu-UMPC isn't nearly as polished as Maemo ... in some ways, I hope Mer is able to advance enough to replace it.

2) The 4 row keyboard makes number typing awkward. But, along with using my 5 row G1, it has at least convinced me that only 5 row keyboards are worth while. 3 row and 4 row thumb keyboards are, frankly, pointless. (the N810 is at least slightly better because it allows you to toggle a single button press as a number, where the Q1U only has a conventional numlock in this regard)

3) The external display, in mirror mode, only seems to support 800x600 and 1024x600. The former re-sizes the internal display. I don't know if this is the Q1U's fault, or Ubuntu-UMP's fault, but "letter boxing" doesn't seem like such a bleeding edge technology that no one thought "Hey, lets have the 1024x600 display capable of displaying on a 1024x768 monitor!" ... but apparently that concept is too advanced for anyone who was involved in the overall process. This pretty much keeps me from being able to use it on a KVM (but, I did figure out how to do a sort of "reverse VNC" process; I have a script which opens an ssh session on my mac, doing the opposite port forwardings that you'd usually do, and then running a local VNC server on the Q1U ... then the VNC client on my mac just connects to those local ports... not exactly like having it on a KVM, but good enough).

4) Screen rotation doesn't work. The mouse and touch screen's x and y axis' don't properly re-map during the rotation, and it becomes impossible to casually use the screen, and difficult to use it enough to un-do the rotation. So it's basically a useless option for the Ubuntu software to offer. Which is a shame: being able to use google reader on a rotated screen would have been rather nice.

But, otherwise, it's a great device. I use it for reading my RSS feeds every morning on the bus to work (the bus I take, which connects San Jose, CA to Santa Cruz, CA, has free wifi). Google Reader on the 7" 1024x600 screen is MUCH more readable than it is on a 4.1" 800x480 screen.

At some point, I'd love to put in a 2GB RAM module, a 16GBish SSD, and have Mer on it. But right now, I don't have time to do all of those modifications.