I just found this blog about ferns at La Selva Biological Station in Costa Rica. La Selva is one of the stations operated by the Organization for Tropical Studies, which ran a tropical fern course I took several years ago, part of which was taught at La Selva. It's a really neat place in the lowland tropical rainforest of northern Costa Rica, with lots of ferns. This video-blog documents research that's being done on the La Selva ferns, some of it by students, and it's really great!
Here's their most recent post, on Lomariopsidaceae. Go visit the blog to learn more!