Something I threw together over the last few days. Not on the market yet as its probably unstable. GUI leaves a lot to be desired for. So for now a dropbox link, will upload it to the market in time.
Displays your My3 usage in an app. When you open app at first, you can enter your mobile number + password in settings for my3.three.ie. If you don't have an account, click refresh once, and an about dialog will show you last 6 digits of your SIM ICCID. This is needed to register with My3. This will save you having to rip out your battery to look at your SIM card!! (Why do 3 need this!)
Please note, https://my3.three.ie is AWFUL slow. I have included options to increase timeouts in settings if you are having problems.
Mobile friendly: http://db.tt/tJDycHwS