Just updated to WP3.1 and performed a network update for the first time. My understanding from the reference above is that it goes through all the network sites and makes database updates, 5 sites at a time.
This takes a long time, even for a few hundred blogs.
Do you do this at Edublogs, or just skip this? Apparently the update happens anyway when the blog owner logs in. Or do you have a faster way of performing this step for the hundreds of thousands of blogs that Edublogs has?