Up and running at my site since day of it’s release, I like it and works well so far, I miss the MU plugin folder though.

It seems like all normal plugins that work for 2.5 work for 1.5rc1
Got the MU-admin top bar working (still need theme editing)
I’ll find a plugin to list my installed plugins on the main page for whoever reads this. And i’ll be adding many more.

A little warning to others, steer clear of plugin installers, also the wordpress.com new plugins message for the dashboard, it hosed me with a white screen for wp-admin and could not get rid of it. Since I used one-click, I needed one-click to delete it, no wp-admin panel=no delete plugins. Can’t chmod files with one-click, permission denied.

So use FTP to add the files.