I bought this about a month ago and it keeps me organised at home and work. Integration into outlook and the ability to read word documents helps me so I can catch up on emails when things get busy at work.
A lot of additional software can also be downloaded from the Internet and installed onto the iPAQ via your PC. I use www.pocketgear.com to look for games etc.
There are two areas that you need to get used to on this device. Firstly the handwriting recognition, take time to practice and make sure you read the instructions on where to write the characters as it makes a big difference. The screen is small so some documents that look great on your PC will be difficult to navigate on the iPAQ.
If you buy an iPAQ PocketPC now you will get a free upgrade to the new super PocketPC 2002. It makes the iPAQ even better than it already is. In the UK Dixons are doing a great bargin on the 32mb version. Though the memory is quite small for a PocketPC you can always buy a CF Sleve.