Here's the 680's page on the company site:

http://www.skytone.net.cn/en/products.php?bigclass=4

And the 600, which is the same thing but with some other Linux dist. on it:

http://www.skytone.net.cn/en/product...10&show_type=2

The 200 and 700 look interesting too... I'd love to see Mer ported to them.