I
do take the point about the trade off between doing the work and documenting it. But, as I said, we have found that a lot of users do value this. The blog approach sounds like a good one. It allows people to comment on their work as they do it with minimal fuss, and can easily be linked to the main project web page. We used this approach on the VERA (Virtual Environments for Research in Archaeology) project and it seemed to work very well.
This is also important for the sustainability of the resource of course. We hope this archive will be available long after you are no longer working on it, and indeed being used as an example of good practice. Thus, for those scholars who want to learn from you and for digital curators who want to preserve your work, it's vital to be able to understand your rationale for technical decision making.