Besides their upcoming Viewpad 7 and Viewpad 10 tablets, Viewsonic is also releasing a Tegra 2 tablet called Viewonic 10 inch G-Tablet that is already on sale at Sears, for $379. The tablet comes with a 10 inch LCD screen at 1024 x 600 resolution, a dual core 1 GHz Tegra 2 chip, 512 MB RAM, 16 GB storage, a 1.3 MP front-camera, and 1 USB port. This tablet is going to be Wi-Fi only for this price.
The tablet definitely looks like a competitor to the Samsung Galaxy Tab, as it's 10 inches, so about double the surface of the screen compared to Galaxy Tab, and it comes with a dual core Tegra 2 which should be a lot better if optimized properly. Unfortunately, I'm not sure it has been optimized that much, as it does look like it has a bit of lag in some instances. On the plus side, the battery should last about 10 hours, compared to Galaxy Tab's 6-7 hours of battery life.
Like Galaxy Tab, it also comes with Android 2.2, which should be alright for tablets for now, though we know that Google has a lot in mind for the Honeycomb version of Android. I'm sure we're going to see Android highly optimized for tablets then, but until then it doesn't look like Android is a lot less optimized for tablets than iOS is for iPad.
Here's a video of the tablet in action: