After looking around the WordPress site trying to find some footprints to hunt down,I figured out...
This tool is going to be even more valuable when WP3.0 hits.
In case you aren't up-to-date on the Word Press roadmap (i.e., you have a life): WP3.0 is going to merge the WPMU and WP codebases. What's that mean to you? Everyone that has an install of WP will be able to run a WPMU without doing any extra work.) So skill is no longer going to be a limiter in who can set up a nice "community" to fill up - the number of hosts could explode.
Ok, hijack over.