...can it be done?
I poked around the html code on a player page from wotbstars.com and it looks like the page is created dynamically each time. So there isn't a snippet of code to put in your signature for the various stats.
I am just a nerd and have no formal education with programming, but I'm guessing there's a way to use the API to generate code that can be pasted into a signature for the forums. Would be fun. ;-)
-PoD