SMF and WordPress

Before I try WordPress, I’m wondering if their’s a feature that would let me attach my SMF Forum to my wordpress blog. So that when users register on the site it registers them on the blog. Vise versa. And that they can use the same username and password on both.

If that is possible, could you give me a link to download or something, thank you.

PS- By any chance do you guys got a Xbox or Xbox 360 Theme?

Thank you