To me, the question for conservatives is whether we are willing to give up 4 years of the presidency to do the really hard work at the grass roots to develope conservative candidates and a consistent message of pro-growth, pro-life, pro-security (military and borders) and pro-freedom.
I would rather spend the next four years of our time and effort rebuilding the party than supporting a RINO who has done nothing but tear it down.
Sometimes it may take a Jimmah Carter to produce a Ronald Reagan. Maybe if Hillary runs it into the ground enough in her first two years, we can take back the house or senate, and create a firewall.
We do need to get an effort going to write in a candidate who will send a message to the GOP. Doesnt really matter who the write in is, it could be Jimminy Cricket for all I care, but someone who would be a figure to show Conservatives who wouldnt vote for McCain. Rush might be a good choice.