General feedback and discussions on the proposed survey
Absolutely - -the OERu anchor partners will definitely be speaking with the institutions who have presented MOOCs with for-credit options and find out what assessment models and approaches were used.
I also agree that valid and reliable assessment is a complex area and is closely related and part of the overall pedagogy deployed.
I agree with your sentiments by asking folk if they've ever used a blog, wiki or portfolio and am planning to include a question in this survey relating to usage / experience with this media.
Lots of work still needed in planning the OERu -- but on the positive side we are doing this and currently based on our anchor partners we will be able to provide accrediting options for OER learners in New Zealand, Australia, Canada and the US at this time.