I have the first 19 sessions from Xen Summit available at http://www.xen.org/xensummit/xensummit_spring_2010.html.
I expect to have the remaining videos posted tomorrow morning. Thanks.
Stephen Spector
Xen.org Community Manager
T: (772) 621-5062 | M: (954) 854-4257
stephen.spector@xxxxxxx
http://blog.xen.org | @xen_com_mgr