The cruise I took last year is on sale, just $599 for an inside cabin (no windows). I think that's less than half what I paid for it last year - although I was paying quite a bit extra for the theology seminars to be included in my cruise. Oh yeah, and free parking on the pier included with this new sale price. Prices go up from there if you want an outside cabin with a private deck.
Damn. So tempted to take the same cruise again. But that wouldn't be very adventurous.