Hi. I'm Barbara Reader. I maintain what I believe is the most extensive listing of Star Trek Fan Films and reviews of them on the web, Star Trek Reviewed: http://startrekreviewed.blogspot.com/
. The focus of the website is on existing, ready-to-watch Fan Films. However, I do have a system of marking existing filmmaker's pages with an (A) for active, a (C) for complete, and a (B) for between, usually a filmmaker who has something in the can he or she hasn't released for a long time and nothing actively in the works.
I also have a listing of people planning fan films who have not produced any. http://startrekreviewed.blogspot.com/2009/06/210.html
. People who have recently started or who seem to me to be actively working have a single letter or number designation, (A) through (Z) or (1) through (9). People who claim to be active but who have done so for a long time (I arbitrarily decide how long and it's not always the same) without producing a film (defined as a release that tells a whole story, which I can choose to limit to stories at least 10 minutes in length) are marked with two-character enumerations starting with A, such as (AC). Films which for whatever reason I deem to be on long term hold or abandon are marked with two letters, starting with B or a letter after B such as (BI) or (CD).
I try to map the locations of active filmmakers or retired filmmakers who have produced a film over 10 minutes in length which tells a whole story. You can find that map here: http://startrekreviewed.blogspot.com/2009/06/4.html
. This is intended to allow would-be filmmakers or joiners to find filmmakers near them.
This forum serves as a discussion website for some filmmakers, but there are also groups on Facebook, on Trek United, and some fan films still maintain individual forums, but most are so slow that they are almost inactive. There have been problems in recent months with malware at Trek United, and I'm not clear on whether or not they have gotten rid of it. Nothing beats in person contact, so if there is an active filmmaker you can assist, you will learn a lot by doing. Volunteering to help an existing project will answer questions you would not have thought to ask, as well as give you a feel about how much work is involved (a lot).
I am not a filmmaker, I am a file clerk, so I have little to offer by way of advice to filmmakers. But I maintain Star Trek Reviewed, which is a website you can go through to find filmmakers who might be able to offer advice.
There are currently three high quality complete TOS era sets, a few additional partial TOS era sets, as well as at least one TOS-movie era set in the USA. I know of no full sets for films from other Trek eras. People who own these sets usually have some criteria for allowing others to use them, and the prices I have heard (which might not be current or accurate) range from costs to $1000/day plus costs, depending on which set you use.