First, Dave Matthews; Now, the Stones: Nothing new to add here, but just another data point. A few months ago, Nigel Ballard of JoeJava and Personal Telco mentioned that Paul McCartney's band used Wi-Fi on the road, too, but more primitively. I hope these guys have 802.1x authentication running.
Old news ;+) http://www.planetmikeblog.blogspot.com/2003_02_01_planetmikeblog_archive.html
T-mobile are sponsoring the tour in the uk, netherlands and germany
The Stones are leaving the network open for fans, press, etc. to use.