For anyone interested... you can see a teaser for a new cave film we are working on at http://www.youtube.com/watch?v=zjyWTS_O7cM
We are looking for volunteers to help if interested... we pay travel costs and give credit, but it is a lot of hard work. Trips are typically two weeks. Upcoming trips to Romania, Madagascar, Borneo, Austria, Slovenia, Thailand, Iceland, China and Mexico. We have already shot in Israel, Austria, Mexico, Belize, S. Africa, Jordan and the US.
There are a lot of challenges getting a film like this done. Politics (governmental and caver), cost, distribution and accuracy. The trailer has some technical problems we are aware of. If you would like to give advice, feel free to contact me directly on NSS Cavers (http://nsscavers.ning.com/profile/GregPassmore)