Memory leads to how we preserve the individuality of the members of a community.

I see at least two directions that are fairly common on the web now (although they are evolving and changing), and we should give careful consideration to both.
One is the Wiki approach, where a common body is open for editing, but the individuality of the contributors is invisible (they identity can be of course retrieved at any time).
The opposite example is the foum/discussion board, where the individuality is highlighted, with each contribution associated to its author.

I think that individuality should depend on the content of the contribution, rather than on the system/technology used.

And it should be more than the dicothomy “registered user vs. anonymous”.
It’s a very human need to be able to “play” with the degree of individuality we want to let emerge from us (think of the choice of clothing, for example. But also on how people intervene in a discussion, etc.)

Sometimes you want your contribution to mix in the common body of knowledge without really stressing that it comes from you. Sometimes you want to stand on the podium and shout out loud. All these actions are important to build the collective memory, and to give it the properties that make it more than a collection of memories.

I would like to see online systems that support this approach, allowing different “shades” of individuality, rather than confining users to follow rules which depend on the technology of choice.