I would second the recommendation for InterlineRates .com.They're a division of Cruise Vacations,Inc. based in Denver.CO. They are one of few Interline Cruise Sites that allow
you to see online, available Cabin Inventory and Interline Prices on most Cruise Ships so you can compare prices.You can also make your own booking online with immediate
confirmation from the Cruise Line. If you would prefer dealing with an Agent, I would highly recommend 'Linda Parker'(Linda@CruiseVacations.net)(800)298-8688 ext.26.
She's always taken very good care of us!!!