I've been laughing about this all month, people really expected a deal. Two words explain why a pre-2013 deal is impossible: Grover Norquist. A quarter century ago when federal taxes were quite a bit higher than the present "lower than ever in your lifetime" tax rates, he convinces a very large number of Republicans to swear to never raise taxes. If they make a deal with the Democrats now, they've gone back on their word.
However, next Wednesday taxes go up all by themselves. Making a deal now means they're raising taxes, while waiting until next week lets them campaign on "I lowered your taxes!!!"
Don't expect a deal before Wednesday. Expect one two or three weeks later.