JumpKnowledge is a Web annotation too that lets you comment on and share any web page. You can add comments next to any text on a page and even create multiple pages of annotations. You can then share these pages with a link, through email, on your blog, or just save them for yourself. The only beef I have with JKN (JumpKnowledge) is that you can’t comment on images. But hey, it’s only in beta 2. Here’s my screencast tour of JKN:
Flash Demo3m29s
(source: CenterNetworks)

