I just wanted to thank everyone in this thread for putting the Lumia 620 on my radar when asked by my wife to find her an entry level smartphone that isn't too big. It's really well priced, and whilst it doesn't have the highest specs, it does have a lot of functionality and can do all kinds of clever stuff.
The best bit is the OS which is very slick, easy to use and looks great. I'm very impressed with WP8, especially as I don't like the metro interface on a desktop PC, but the WP8 equivalent is really good on a touchscreen phone. More importantly, the wife loves it to bits.