OK, so here is my review of the beautiful Norwegian Jewel. Cruised 22nd July 2007.
We flew with British Airways, and arrived at Terminal A. Unfortunately, our luggage was on the carousel in Terminal B, so we had to go back through security, as if we were checking in for a flight back out of Barcelona (crazy I know). This was very frustrating, as we (and many others) were just desperate to get out of the airport and get onboard. The transfer bus NCL used didn't have very good aircon, and we were a bit "wound up" by the time we embarked.
Embarkation was an absolute breeze. No queues at the Latitudes desk, so we were onboard within 10-15 minutes.