Hi! I have been travelling in Central & South America and would like to make the suggestion to include the Hotel "Jardines Arenal Lodge" in your guide for Costa Rica, as it is a really nice and quiet place to stay (family-run hotel) and more very good value for the price you pay :-)
The owners, Jose and Hernán Blanco, speak Spanish and English and are really helpfull with everything, e.g. organising tours etc.. As the hotel lies just outside of La Fortuna, they usually provide transportation to the city.
Their homepage is www.jardinesarenal.com (email: email@example.com, phone 00506-479-97 28).
As I understand, the price range is about 20-40 US$. But you had better check with them.
Saludos, Katharina (liked it so much that I got stuck in CR afterwards...)