If you have a Sony Ericsson p800/p9** phone I recommend you go along to this forum. Pretty good (don’t know about the other forums on there!).
The p910i is a dammed awesome phone. Small enough to be pocketable phone, but more than powerfull enough to be a great PDA too. 32mb ram, 64mb Flash, with a 0.5Gb memory card ( the proprietary Memory Stick is a major downside though!).