Well, my problems with getting up and running with the MyTouch turned out to be a SIM card problem and has now been fixed. I'm into my second day with this thing now and so far so good. It is taking me some time to get used to the on-screen touch keyboard but I'm getting there.
The app store is so far a little disappointing as there are lots of "doesn't work on G2" comments. Some of the apps I've downloaded have flat-out not worked but a good few have worked fine. I'm still exploring. Biggest hardware disappointment so far: that weird cable you need to add to turn the usb connector into a headphones jack. What where they thinking?