Compares many of the most well-known photo sharing sites, although it seems to have missed Fotki. Fotki is a top notch site, and deserves to be in any list of top contenders.
Screen sharing is characterized by the ability to real-time share the contents of your computer screen with one or more remotely Internet-connected users.
Announcing Vyew 2.0: Free Web Conferencing and Always-On Collaboration * 100% Browser-based - No downloads or installs * Shared viewing of: DOCs, PPTs, XLSs, JPGs, PDFs and more * Real-time Desktop Sharing and Screen Capturing * Tools to Whiteboard, Draw