Annotation System-s typically allow any reader/user to attach a comment (structured or not) to any web object-node they find.
== Systems that make Annotation visible at the original source ==
There have been browser plug-ins like Third Voice for these.
In the short-term it seems like a bad idea to have annotations spread through multiple non-integrated systems. On the other hand, maybe it makes sense to have each Virtual Community running its own annotation system. But how many communities are you part of?
- This seems similar to the issues of having Chandler/OSAF hold your personal notes, while also allow sharing/mixing of content in something like a shared team Wiki.
I wonder whether BackLinks creates a similar effect...
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