posted message: Not sure who all uses mendeley, but one of the features they have are groups, where people share and comment on papers. there's a few groups related to learning that seem interesting. here one: http://www.mendeley.com/groups/2126423/critical-perspectives-on-educational-technology/papers/. and many others listed under the general "education" umbrella. check it out! http://www.mendeley.com/education/