Someone should make a moblogging site where users can post celebrity sighting photos from their phone or PDA, along with a brief description of where they’re posting from.
The closest I could find was this NYC-specific SMS group, which seems to be focused on text messages instead of photoblogging.
July 9, 2003: Joe pointed me to TextAmerica, a site that allows anyone to create a mobile photoblog (“mophos” or “moblogs”), so I created a new one for Celeb Sightings. Anyone can post to it by e-mailing their photos to firstname.lastname@example.org from their mobile phone. Get to it, people!
August 12, 2003: Buzznet.com has a celebrity moblogging page that people are actively using. Lyle Lovett, Janet Jackson, Jay Leno, and Randy Newman are some of the current highlights.