Keep an eye on Creative Spaces, the National Museums Online Learning Project. By connecting the collections of nine National Museums, the site offers users a chance to learn from all the collections.
I particularly like the notebook feature. If you were Darwin, you'd be creating a field notebook and collecting specimens. Here, you can do it, and save it, online. That's terrific public engagement.
The site launched just last week - with much pomp and circumstance. Looks worth it! Try it - http://nhm.nmolp.org/creativespaces