how often does NCL have sales?

We just got back from my first cruise and we loved it and plan on going again in late 2009 or early 2010. We were wondering if we should just book a cruise or does NCL have "semi" annaul sales or anything along those lines that we should wait and watch for and book at that time?

Sales come and go. I would not expect sales if you are going to book a year out. The good news is that you can usually (not always) cancel and take advantage of a new sale.

There are lots of great sales right now for sailings in the next few months as a result of the economy.

Booking now does not really hurt you, normally. We tend to book well inside the 6 month window and take the good deals.