Possibly the most compete repository of ZX Spectrum info can be found at World of Spectrum. This is where I found the link for the emulator I'm using on my phone. I'm still playing the football manager game (and have won the FA Cup a few times). I still need to find more phone-friendly games though. Arcade games don't always play very well because of the small keys on the phone. I'll have to find some strategy games which don't use too many keys to play.