Seagate revealed a bit more than they might have intended today by posting up information about their 640GB FreeAgent Go on their website. And actually, this is pretty big news, as it's one of the first drives to exceed 500GB, at least for external storage, that is.
The larger capacity 640GB drive has fewer color options than the smaller drives, coming in just silver and black. However, much of the other features are the same, including its USB-only status.
There's also support for the Seagate docking station. We don't have any information on availability or pricing yet but that should all be available soon, or at least once Seagate makes this thing official.