2. Checking with MobileMe for linked photos
3. Checking for Places information
4. Sending a sample of your DNA, credit card details, inside leg measurement etc back to the Mother Ship. Admittedly, this is the least likely.
Regards
TD
But you know, the only people who can answer this question with certainty is Apple, so try asking them.
"iPhoto wants to connect to gsp1.apple.com" Why?