We were in Israel last year with Pesach and just before the first day of Unleavened bread, the discussion of whether or not to keep a vigil on this night came up. Most of the believers in the Jerusalem hostel at the time were of the opinion that we are to stay awake all night, and that it was commanded to do so. This was new to us; we have read the verse they quoted to prove this many times, but we have never really seen it that way. We did a quick study, and their interpretation to stay up seemed to be right so we decided to err on the side of caution and just do it. It turned out to be quite a blessing. We did some Bible study and talked and when the sun stated to rise, we went to sleep for a while.
So, it is almost Pesach again, and we want to do a proper study of the subject to make sure our interpretation is correct, and we do stay up if we are indeed commanded to do so.