NCL Sea is offering some great singles no-supplement cabins from NY. Your own cabin for the same price. Check with your cruise-only TA or find a cruise-only TA at the bargain-finder section of cruisemates - http://www.cruisemates.com/CF/bargfind/index.cfm
From a different board from Stuart Suss:
GREAT NEWS FOR SINGLE TRAVELERS ----- Norwegian has just informed us that they are waiving the single supplement on the following cruises …..
Sea - 8/31 - 7 night - Bermuda (New York) - Inside: $ 599, Outside: $ 699
Sea - 9/14 - 7 night - Bermuda (New York) - Inside: $ 529, Outside: $ 649
Sea - 9/29 - 6 night - Bermuda (Philadelphia) - Inside: $ 529, Outside: $ 629
Sea - 10/5, 10/12 - 7 night - Bermuda (Philadelphia) - Inside: $ 599, Outside: $ 699
Sea - 10/26 - 12 night - repositioning cruise from Philadelphia to Houston with stops at Bermuda, St. Thomas, Aruba, Grand Cayman - Inside: $ 599, Outside: $ 699
Majesty - 8/24 thru 10/19 - 7 night - Bermuda (Boston) - depending upon the sailing date, Inside cabins start as low as $ 549, while Outside cabins are priced from only $ 649
On the NCL web site, these should be designated as fare code Y1 or Y2. You may wish to see if your favorite travel agent will meet or beat these prices.