Hello,
if I activate the plugin a warning message appears.
Can I run this on a WPMU / WP3+ Multi-Site setup?
Yes. In fact, it has been designed for it. Tested on WPMU 2.9.2 and WPMS 3.0.1 both with normal activation and with Network Activate / Site Wide Activate.
Sorry, I am on WP 3.1…
Any suggestions?