It looks like a panda cub that was born on the 13th of July to Ying ying, went without me noticing. Though Performing a google search didn't bring show him / her up.

So now we have 5 Panda Cubs this year.
I will update the Pandas Born in 2008 post.

UPDATE
Susan Langa sent us an Email about the missing Panda, (Many thanks Susan), she sent me the Press release, I have managed to find it on the Wolong Panda Club, website and added it to the References.