Craig,
The info from Jag, although insiteful, is not completely accurate. I have parked at the pier for a cruise in the past. It was last summer and it was Celebrity not NCL. It was extremely convenient. The parking is above the pier you are departing from. The cost, however, was correctly stated. I think it was $120 for a 7 day cruise. This really isn't too bad. This year I took a car service with a total of 6 passengers (we had a van) and it cost a total of about $300. Since there was 3 couples it still came out to $100 each. This years cruise was on NLC Dawn and there was an interesting change in our debarkation location. We were scheduled to return to Pier 92 (55th Street) but on Saturday night they sent written notification to each stateroom that we would be coming in on Pier 88 (49th street). This obviously was a little less convenient for those that parked. But to be honest, it was probably still more convenient than the hour wait we had for our Van. It was complete madness upon our return. It took us an hour to get out of there. If we had parked a car like last year we would have been out in 15 minutes.
If you need any other info on Debarkation, Embarkation or the Dawn let me know.