hot mail is a pop3 email (post office protocol)
Unfortunatley I can't help you setting up the 300 to send and receive your pop3 email. I'm a 270 user and from what all I've read about Sprint and setting it up to send and receive other pop3 email can be a nightmare (not to scare you, it can be done) try using Eudora, it's a free email app to send and receive your pop3 email.
http://palmgear.com/software/showsoftware....28&prodID=12042
As far as your AOL mail goes you should use AOL 3.0 for palm. Works great and runs very similarly to the desktop version. It's $19.95 but worth it if you want to send and receive your AOL mail. When setting it up just make sure you set it up to use "another ISP" for your connection that way it will not use AOL dial up numbers to connect.
http://handango.com/PlatformProductDetail....=0&platformId=1
Greg