Do you use Diigo? Are you interested in using Diigo? It's pretty awesome!
Diigo is a bookmarking and annotation tool. It lets you annotate web pages and pdf files (by highlighting and adding sticky notes). The page is then saved in your library-- along with the annotations. You can share your bookmarks in a group for collaborative research, as well.
Last year we had an educational plan for Diigo. We are looking into doing that again this year (given the cvuhs --> cssu.org name change, we had to re-apply). To answer a question I've gotten, it's OK to go ahead and log in with your cssu.org address.
Please let me know if you'd like me to get you started with it.