You know, I sometimes question the purpose of that function on Picasa. There is a similar one on iPhoto. When I look at a photo, I pretty much know who is in it. Are we all eventually going to have extreme dementia some day? In which case we'll all say "Thank you Picasa and iPhoto! For helping me remember the names of the people I love and cherish on my archaic computer machine. Maybe when the nurse decides to change my depends, they'll decide to visit me again like they used to."
I suppose it's handy for sorting by individual...
I don't wan't to get old.