Gothic Sports. Well, they released vol. 4 in January 2009, it says on wiki, but only in Germany and (possibly?) Spain. In the UK we haven't gotten it and by the sounds of it, from the gap between the volumes to now, it might be on hiatus. D: Shame. It was awesome. I'd love to read more of it... :/

Ooh a good site for Hetalia is http://aph.starry-sky.com/_extra.html
I tell a lot of my friends to visit here and I found the link on LJ. LOL You might already use this but heck I may as well recommend it! :P
I like how you can pick what ones you want to read based on the characters too; I love England, America, Prussia, Poland and Lithuania, LOL~~ :DD The anime is really cool too~ But almost impossible to follow if you're not used to Hetalia's randomness. XDD