Good News! Red Hat has just released Red Hat Enterprise Linux 5.9. One of the numerous improvement included Hyper-V Linux Integration Services built in into the operating system.
Check out the press about this good news:- http://www.redhat.com/about/news/press-archive/2013/1/red-hat-announces-general-availability-of-red-hat-enterprise-linux-5-9
Too bad, i cannot talk much and currently still waiting for people to give me an ISO to play around with this version. So if you got an ISO, do give it a try.