Viewsonic has announced that they are throwing their hat in the tablet ring with a 7 inch tablet slated to hit the UK this fall. IT will be GSM enabled so phone usage will be available; most likely through the use of a Bluetooth device as I doubt many would want to hold this to their head.
The tablet is expected to hit shelves running Android 2.2. A 3 or 5 megapixel camera is expected to be onboard; no word on a front facing camera. Prices will be around the 300-400 GBP mark.