WordpressMu 2.9.2 to Wordpress 3.0 upgrade 100s of blogs

Hey guy I have successfully upgraded one of my WPMU sites to wordpress 3.0.1.

Now the trouble is when U try to update network, I have 16,000 blogs and the upgrade errors out after a while.

Warning! Problem updating . Your server may not be able to connect to sites running on it. Error message: A valid URL was not provided.

Not really sure what the issue is, but I would like to upgrade them all.