Redirect to created blog after signup of new blog

I have my wp network setup so that existing members can register blogs, and there are no mail activation.
I am looking for a way to redirect users to the blog they have created, instead of showing the text:"The site xxxxx is yours.
xxxxx.net/xxxxxx is your new site. Log in as “admin” using your existing password."
is it possible to do this in functions.php or as a MU plugin?