incase anyone was wondering why their borg tribble asked for access code 47, I believe it's an easter egg referring to the number 47 on Voyager: http://www.youtube.com/watch?v=SPoiH0JlQ9A
Its more than just voyager. The number 47 is a meme that has infected every star trek incarnation since Next Gen as well as a lot of other sci fi and pop culture. See the wikipedia article: http://en.wikipedia.org/wiki/47_%28number%29