As both Reid's memo and Dove explain, only one Republican would need to monitor the Senate floor. If the majority party tried to move to a vote, he could simply say, "I suggest the absence of a quorum."
The presiding officer would then be required to call the roll. When that finished, the Senator could again notice the absence of a quorum and start the process all over. At no point would the obstructing Republican be required to defend his position, read from the phone book or any of the other things people associate with the Hollywood version of a filibuster.
....Since [Strom Thurmond in 1957], says Dove, the only time the majority tried to jam a bill through the Senate without having 60 votes ahead of time ended in failure.
Robert Byrd, a Democrat from West Virginia, was majority leader in 1988, when Democrats controlled 54 seats and wanted to push through campaign finance reform. But Republican minority leader Alan Simpson of Wyoming was easily able to block it by sitting on the Senate floor and occasionally noting the absence of a quorum, thwarting a vote...."It was almost a farce," says Dove. "The bottom line is the bill never passed."
Back to square one, then: get rid of the filibuster entirely. I wouldn't hold my breath waiting for that to happen, though.