2006 World Cruise is really almost out of the question for two singles. The single supplement is gone and so you have to pay for two people in each cabin even if only one person is in the cabin.

The 2007 world cruise guarantees a 30% single supplement until 12/15/05 and then it may also disappear.

Not much left in the way of good cabins for 2006. We are past the first cancel period where you lose 20% so most of those who were going to cancel would have done so by now. There are always cancelations for emergencies and waitlists clear more often than people realise.