After hearing Microsoft have recently been granted the patent for emoticons....thats those smiley or unhappy faces we have all used in emails for years....by contrast this cheered me up:
http://news.cnet.com/8301-13505_3-9803429-16.html
Someone at IBM has a great sense of humour!
Sadly Xen is not well loved at the moment. Someone told me Citrix are holding back latest kernel work ... worse it is not stable on Debian Lenny. See: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517449
Fortunately it takes but a moment to convert guests over to KVM. Kvm is backed by red hat and they seem to be doing all the right things.
KVM start here: http://wiki.debian.org/KVM