Right now, there's no way to change a submitted entry, and because anonymous users can also submit entries, it'd be a security hole to allow editing based upon a not-secure cookie.
If you've done a mistake, just post which and it'll get merged out as soon as possible - that one is fixed now already (though it was really minor I'd say
)
Anyway, thanks for submitting, this list has actually to be based on user input to run smoothly - the script has been improoved quite a lot today again, I'll post about that in a minute.