The Gateway EC18T Tablet PC appears to be a really nice looking convertible tablet. I'm not sure that it will have any features that will make it stand out from other convertible tablets out there, so it's too early to get excited. The main feature I'd like to see are illuminated keys on the keyboard for those of us who blog at night. The HP EliteBook 2730p tablet PC has a pop-out LED light that shines down on the keyboard, but that's about the only convertible tablet out there that's friendly for use in dark places (such as radiology suites).
To see some photos of the Gateway EC18T Tablet PC, visit this page on Engadget.