WARNING! This website is no longer actively maintained. It is an archive of 2 years work by Doug Belshaw who now blogs at dougbelshaw.com...
I’ve just come across Zonetag via Paul Stamatiou’s excellent (non-edu) blog. Developed by Yahoo! Labs and available for Nokia and Motorola phones only at the moment, it allows you to post directly to Flickr from your cameraphone. Yes, you can already email them but this makes it even easier. It’s a shame I’ve got an Orange SPV and can’t test it - I should imagine this would be great for field trips. I’d be grateful for feedback from anyone who can and has used this! 
Popularity: 2% [?]
My mate Robin was using it in Paris last week:
http://www.flickr.com/photos/robinhamman/320726308/
It seemed suitably cool but, alas, I have a T-Mobile Vario.