Uhmm I would go for http://www.onehash.com/ . At least is funny to bet on sports there, the bank pot has no limit and the coefficients depends on how many people bet on a event, is like old style betting. The platform only retains 1% of the earnings as fee.
I ve been asking here and in reddit, wondering to bet there or not, but finally i decided to start after a Russian friend (hehe the bitcoin world is wide) told me that in a Russian forum were talking about it. I don't know Russian, i have enough with english, but he told me that they were betting there and they were satisfied with the rates. Now that i'm betting there i want more people to bet there!!
If you know russian you can check yourself here in this link, what they are saying XD, but mostly is what i explained
http://forum.bitcoinfo.ru/viewtopic.php?f=16&p=35436
hmm ok, I get it. Service looks nice but I was looking for more opinions and I found next russian site......... Does your friend can translate it?
http://fastmoney.cc/showthread.php?p=55958