Hi Joshua, I would think that you may have found a suitable touch screen for your pi, but for others still looking I use the Adafruit 2.8" Pitft. There is a choice between resistive (the one I bought), or capacitive screen,the latter being a bit smarter than the former in having a proper surround to the screen. Adafruit also provide a compiled kernel so you don't have the headache of setting it up. It displays a cut down version of the desktop on issuing startx after logging in,with a large raspberry and six icons; scratch, wolfram etc. It is just a case of plugging the screen into the back 26 pin header (B+) and booting the new kernel. The terminal output is shown, later than on the desktop, after the device drivers have loaded. Be aware that I believe you can't have hdmi at the same time as the touchscreen. I am still experimenting so haven't yet removed the plastic screen protector but it seems very responsive nevertheless. It is also difficult to use as a desktop replacement as the windows it displays are wider and longer than the screen. It is easy enough to scroll left and right but I have yet to find how to scroll down so sometimes the selection boxes are off the screen so are untouchable (sorry, couldn't resist :-). I hope this is of help
I just got one from eBay, on first impressions it works ok, comes with a CD with a pre prepared Raspbian on it that powers right up to the LCD (Once copied to a SD card) with full touch.
4” is quite small but it works ok and has the full UI on it just the same as an HDMI screen would have.
There is also a slight refresh delay (You notice the screen refreshing so it may not deal well with a movie for instance )
It is all connected via SPI I believe which would account for the slower than normal refresh
I recommended a 5" Eleduino from Amazon earlier. You said that Amazon doesn't deliver to the UK. You can buy it direct from http://www.eleduino.com/
In fact, the one on their website is a newer version. They also have a new "customized" Raspbian image, reflecting Raspberry Pi's changes dated 12-14-14.
The one I got from Amazon, when I used their latest image, had mixed results. It booted up with a working display when used with mouse and keyboard. However, I think that in order to get the touchscreen working, I need to add some script and my lack of knowledge of Linux commands has kept it from working.
For others who are interested, their updated model will be available in about a month,
mcmelectronics.com for the official 10 finger cap touch model free shipping right now, $60 ish and nothing beats the foundation for compatibility and support!
