[dntrkv]

I actually think this has a ton of potential. Quick example would be documentation for some framework. Users can comment directly on confusing parts of some documentation, and after some discussion, it can be edited to fix whatever confusion there was. That's just one example, I think anywhere you have big blocks of text this will be handy. Even simple things like marking typos in an article would be much easier if every site used a single annotation service.

[bliti]

Good point. Now, the question is, are the annotations available for download? If not, why bother? Annotations are useful if they can be saved and moved (just like bookmarks).

[ehmorris]

You could use the API to export all your annotation data

[bliti]

Nice. Is that a future proof feature? Will I be able to download the data in any point in the future? After being punched in the mouth but other APIs I'm wary of integrating without some understanding of what the future might look like.

[msie]

You'll have to create a backup service to periodically export your annotations.