Yeah. I've got all the phone numbers I need in my phone.

My address book and calendar are kept in Microsoft Outlook. If I could be bothered (and could find any decent sync software), I'd keep my calendar in my phone too.

I use fusionOne to replicate my Outlook data between work and home (and onto my laptop). So, I'm never that far from my data anyway.

The other benefit of fusionOne is that I can get at my data using WAP -- I must remember to enable my GPRS service. Unfortunately, fusionOne is a bit lacking when syncing with Nokia phones.

Generally, however, if I'm not within range of my toys, I've got my girlfriend with me. She's much better at organising my social life than any PDA would be.