Having a problem with Comment Ids

So after months of lurking around, I'm finally getting active on Indiblogger, and just when I want to leave a comment on someone's blog post, I'm asked a million questions about which ID to use. The options I get are:

-Google

-Live Journal

- Wordpress

-Typepad

-AIM

-OpenID

The problem is, since my blog is hostel on wordpress.org and not wordpress.com, It doesnt accept my wordpress.org credentials. The problem is, that because of this, i cannot comment. 

(Using my personal Google ID is not an option) 

What can I do? Is there some way around this that I just haven't noticed yet?