AT&T Wireless today launched the Ogo CT-10 wireless messaging device (email/IM/SMS). While newly announced today, the Ogo was no surprise–an FCC filing revealed details of the device prior to today’s announcement.

The Ogo costs $17.99 monthly for unlimited service, or $3 less per month for AT&T Wireless customers. The Ogo does not have the ability to make phone calls. The unit itself costs $99 after a $30 mail-in rebate.

This is the only device from AT&T Wireless that does not make phone calls. Here is what it does have:

• 4,000 color screen
• Bluetooth
• AOL/MSN/Yahoo! IM and portal (unlimited use of one is included in service charge, extras are $3 more a month)
• 4.6″ x 3″ x 1″
• 4.8 ounces

You can purchase it starting today online or in select stores. More stores should be getting the Ogo in within the next few days.