Public Policy Polling has released more results from their October 31st and November 1st survey of the Maine electorate (the same survey that showed equal marriage losing 51-47).

The new numbers (based on 415 likely Republican primary voters) show Senator Olympia Snowe losing to an unnamed "more conservative challenger" 31-59.

Not sure where you could find such a challenger who could run any kind of real campaign against Snowe.