WordPress MU

I'm working on a plugin that adds some values to blog_options during blog creation and checks on them later. Right now it works fine if a blog is created through wp-signup.php, but not if the Site Admin creates the blog through wpmu-blogs.php .

I was wondering if there were a way to add some extra fields to the site admin's "Add blog" interface without modifying wpmu-blogs.php.

Have a look in the wpmu-blogs.php file and see if there are any filters or actions in there that you can hook into.

That would be my first step. If not, then my second step would be...

There's plenty of hooks. :D