For the group developing standards for e-book annotations, sharing of these needs to be more discriminatory than the current "all or nothing" that Amazon does with Kindle. I would like to be able to:
1) Share some annotations but not others (both within the same title or across different titles).
2) Share specific annotations with specific groups. For example, if I'm reading a book that my book club is doing, I may only want to share annotations from that title with my book club.
3) Be able to turn off sharing from others while still being able to mark annotations for sharing while I'm reading a book. (Example: With my Kindle, if I want to be able to add an annotation and share it, I also am in "receive" mode to see others' annotations.
4) Separate highlights and annotations. Again, using my Kindle as an example, there's no way (that I've found) to turn off the "underlining" that shows what others have highlighted unless I turn off all the sharing, including annotations.
5) I'd like to be able to easily toggle the annotations and highlighting on and off. I don't want to see what others have underlined/highlighted in advance of reading it myself. It changes my perception of the passage. I want to read things and get my own impressions before I see what others have marked or shared.