That theme is a free one made by Studio Press (http://theme.wordpress.com/themes/enterprise/)
I personally don't like the "meta widget" (the one with 4 links - Register/Login-Logout/Wordpress.org/XHML validator).
as I'm gonna purchased a domain and my blog will (appear to) be a commercial corporate one.
I know them used in blogs hosted at wordpress. COM can not be freely edited (i.e no HTML or PHP or else). And I can imagine what timethief may say, but I found out something else.
There are some blogs using this Enteprise theme but they don't have that META widget installed.
If you're gonna tell me "Hey chickenwuss, go to Appearance>Widgets and delete it", please hesitate because I've been there since the end of July.
The blog I need help with is tangbinhduong.wordpress.com.