Just started gambling on this new website. It is brand new, but has a lot of the competitive esports games: cs:go, league of legends, hearthstone, etc.
You can also bet on hockey and basketball in terms of the sports betting options available right now. They are probably going to add baseball and mma soon. Site converts bitcoin deposits to current usd price. The site also has something interesting betting option that allows you to bet with Steam items for any of you gamers out there.
Check it out Here.