Record and share real-time (but not live) drawings and whiteboards with YouTube-like embedded videos at web site Sketchcast. Sketchcast's intro video (above) touts the product as a potentially new style of blogging, but it seems better described as a way to share whiteboard ideas online. On the other hand, if you're looking to collaborate with a live whiteboard online, check out previously mentioned Skrbl and Scriblink.
Record and Share a Whiteboard with Sketchcast
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