I really don't think Hillary is a threat to get the GOP nomination, unless you know something that I don't. But in some ways McCain is more dangerous than Hillary. Hillary you know what you have, McCain is unstable.
I get nervous when people say things like Hillary isn't dangerous, or we have a Republican Senate/Congress -- for VERY good reason. Executive Decisions. BILL Clinton signed a record number of Executive Decisions -- Congress has no controll of these and they can be very dangerous in the hands of the wrong person. Look at how Carter immedietly pardoned all Vietnam War Criminals -- before he even left the Rotanda after his innaguration.
I'm not certain McCain would make it through, four years is a long time and all sorts of health and other issues can intervene; but I'll take McCain over Hillary -- sorry if it offends -- and everyone deciding to vote for a Libertarian instead of Republican in '08 is making a vote for Hillary same as a vote for Nader in "00 and '04 was a vote for the Bush.