Facebook: Building a Better Photo Uploader
facebook.com
facebook.com
But did it seriously require a complete rewrite instead of just fixing that woefully buggy Java applet? And could they really not have achieved this new implementation with Gears or YBP? They're rather vague on what was missing from those plugins, and I remember Google stating that they supported decent file upload functionality (including drag and drop) just fine.
That gets me thinking about other possible browser plugins along those lines: - Expose the native filesystem - Fire an event when a USB device is connected - Or when email is received ...
NPAPI plugins are actually pretty good fun to write.
Nothing like being able to execute arbitrary x86 code through the browser....