Dexter Eugenio said
1 year, 4 months ago: stalking is such a harsh word…. 
research is much more suitable.
and yes, Facebook and LinkedIn are terrific for this. I have gained many clients from LinkedIn stalk, errr researching and really there is no better way to get to a specific company or person through LinkedIn.
i think 6 degrees of separation is slightly exaggerated and 3 to 4 degrees is much closer to the mark for me anyway