The issue with online gambling is that in its previous form, when it was finally and fully outlawed in 2006, the Federal and state governments weren't getting their cut of the take and many people weren't reporting winnings to the IRS.
Its not especially a moral or religious issue now, its more a taxation and revenue issue. The House Financial Services Committee approved a bill to legalize online poker and some other forms of online gambling in 2009, it just hasn't made it all the way through Congress yet. I imagine there will be some Republicans opposed to it on religious grounds but once Congress figures out how to tax and regulate it and how much revenue they can rake in off it, it will be back.