MissSky Canapoy tours offers a two hour, 8 point zip-line course. Eventually the course is supposed to terminate in a bar in 'downtown' Nosara. As of April 2008 the course was still under construction.
Surf. Playa Guiones sports 2-6 ft waves, but getting past the rough stuff can be a lesson in humility. There are several places to rent boards. The cheapest option is to talk to the blond American at the Bar Tucan. He's given a $10/day deal in the past for 9 ft boards to folks he likes. Also, checkout Juan Surfo he claims this is his real name at Punto Surf Shop. Nice guy, decent prices and a local character.
Costa Rica Yoga Spa
Will tailor a yoga retreat to exactly what you want, including trips to the turtle hatchery and zip line trips. Their yoga studio is a huge beautiful hut overlooking a huge area of national park - a great place for sunset yoga. Owners Jill, Ben and Darin are super friendly and helpful. Rooms are beautiful, all with views and balconies.