I’m getting a server error message from WordPress when trying to view your blog.
Kafkaesqui pretty much covered all of your questions but you can find additional wordpress templates at the link below:
http://codex.wordpress.org/Using_Themes/Theme_List
It’s pretty safe to keep, don’t worry. 😉
Why not just register a new account on wordpress.com? You should be able to just aquire a brand new API key that way.
I agree with samboll, nice work.
Glad you got everything fixed. 🙂