I had a chance to test run in the 2XU compression calf sleeves (http://www.2xu.com) We had a choice of the sleeves or the socks but I'm a sleeve girl.
The rep for the night handed me a very colorful pair in teal in XS, I threw them on, and off I went.
They were nice and snug and to my surprise not sweaty after my run at all. The rep asked me what I thought of them and we laughed because I said they fit like my calves were wearing pajamas all nice and snug :)
I would definately recommend these for anyone looking for a new brand or a second pair!