Is ATT's ogo A Worthy Purchase?

PhosterPharms writes "The ATT Wireless ogo is a new device on the market which allows unlimited instant messaging, e-mail, and SMS for a $99 purchase, $20 activation, and $15-24 a month service fee depending on options. The idea of having access to my e-mail and AIM no matter where I am is very alluring, but the only review I can find seems somewhat negative. The ATT Forums seem mixed. Does anyone have any experience with the ogo or any suggestions for alternatives? I don't need another cell phone, just a cheap e-mail and IM client - the $300-400 that service providers want for Sidekicks and Blackberries (Plus $40 a month) seem a bit too much."