From a GOP bud there:

Frist introduced the compromise amendment (as a motion to recommit to the committee with instructions to send back a substitute amendment) and filed cloture on it and the Frist bill. So on Thursday at 10:30, well have the cloture vote on Specter (since dems wont let us vote on amendments) which will fail. Then sometime on Friday (unless theres an agreement to do it earlier) well vote on cloture on the compromise which will likely fail. If it does, well then vote on cloture on Frists bill. That may be all she wrote.