Palm Z22 Handheld	This is a great cheap one for a student. I had this one too. A bit slow on the text input but fanatastic battery life
	HP iPAQ 111 Classic Handheld (FA979AA#ABA) (110 Series)	I have this product and it is the best PDA I have ever owned. Check out my blog post http://publicmarketsoftheworld.blogspot.com/2008/02/ipaq-classic-112-pd