Sometimes lugging around a laptop just isn't practical.
I've got a <a href="http://www.hp.com/cposupport/prodhome/pt320lx.html" target="_blank">HP 320LX</a> - it's a couple of years old - but a 32Mb flash card keeps it usable.
Pocket Word - for writing wepages, emails etc while on the train/plane
Xaudio mp3 player....
Pocket Outlook - checking email
Pocket IE - beats the hell out of WAP
Address book - sync with phone and home pc
I would like the <a href="http://products.hp-at-home.com/products/detail.php?id=F1816A&j=1" target="_blank">Journada HPC</a> - it's a little bigger than mine but it's colour, has a faster chip etc - but I can't justify it when mine still works ok.