Sorry it looks like all your posts required moderation. I'm not sure why that happened. I know the admins for the site have been working to deal with SPAM posts.
Xenserver is probably going to be a while. I don't have any dates or time frames to give you on Xenserver
KVM will be fall/winter this calendar year assuming no set backs. I'm not sure if the beta for KVM will be an open beta. Meaning anyone that wants to can participate. If its going to be an open beta I'm sure we will send out a lot of posts about it.
louis