Check this out - dateline review of different hairloss treatments:
http://www.youtube.com/watch?v=ThL7ZgFIgtc (part1)
http://www.youtube.com/watch?v=5JDFSxcTDyg (part2)
http://www.youtube.com/watch?v=kJ0AaoVttO4 (part3)
Mind you these are mid 30's-50 year old men who did the trial. Fantastic results from a laser comb and pretty cheap comparatively ($700 one time fee)
Where do people get their rogaine supply? Seems pretty expensive from london drugs ($50). I wonder how legit will ebay stuff be.