I have ordered a UK One X dock, and modded it to fit the US ATT phone, as suggested in this thread. I cut out a small rectangle where the pins are, and moved it over, and glued it into place with some loctite epoxy. It was extremely difficult to get the pins to be in just the right spot, and I didn't get them quite perfect (but really close), so it wouldn't work with the little tray part that goes between the phone and the dock (I guess it's an adapter to fit a bigger and smaller version of the phone or something??). But I was able to put some little foam spacers in between the phone and the dock to get it to line up just right. Not as pretty as the dock started, but it works great, so I am very happy with it.
Also, because it's the UK version, the wall plug is the UK type of plug with the 3 big prongs, so you will need an adapter to plug it into a US socket. Also, the end that plugs into the dock is kind of different from a regular micro usb plug. A regular micro usb plug will fit, though, so I tried one, with the charger that came with the phone, and it didn't work/charge. Dunno why.
The dock does block the headphone plug, and I also found that it makes the lock button difficult to press, but that might be because I couldn't fit the spacer tray thingy. The dock speaker does work, and is pretty loud. Not sure if I'd trust it for an alarm clock though.
I wouldn't really recommend attempting it unless you really want to have a dock. This is the first phone I've gotten that has pogo pads, and I really wanted a dock that would use them, and I've done enough mods like this that I know I'll be able to at least have a working dock at the end, even if it's really ugly. Even then, it took a lot longer than I was expecting.
I'm at work, but I'll take/post some pics when I get back home, sorry, but I forgot to this morning.
Also, thank you Marskramer14, I wouldn't have attempted this if you hadn't posted the pics of what it looks like inside.