Came across this in the Guardian, thought you might find it interesting. It's a list of all the United Academy products still playing professional football, wherever that might be.
http://blogs.independent.co.uk/extra...ll-manche.html
From Kalam Mooniaruck at Cambridge City to David Beckham at LA Galaxy, they are at widely varying levels of play. Looks like he came up with about 50, and then readers have written in with a few more.