I'm looking for a fairly user-friendly open source protocol for developing a web-based project that basically combines organized, user-contributed links (kind of like an online bibliography) with tagging capabilities and discussion boards. It would be great if I could develop something easy for users to navigate, as the site would be geared toward college-level writing students and instructors.
Right now I'm looking at Drupal and BuddyPress, and I'm also thinking to use APIs, possibly from delicious, Mendeley, and I'm interested in looking into OpenCalais for pulling metadata from the linked sources. But, I'm really new to all of this and I'm wondering if anyone else has any other suggestions of tools that I might look into using--?