Some Useful Links:

for those of you interested in setup development, you can't go past Ricardo Nunnini's GPL Foolishness site.

Also, probably one of the best (and oldest) all round GPL site is still Alison Hines' Eagle Woman Grand Prix Legends

Looking for pre-made FD and F2 setups?  Check out the VROC-F2 setups page. (This site is constantly being updated so keep watching it)

Stefan Magnussen's Addons page.  Very good summary of what is available.  I was thinking of doing my own Addons page, but there is no point trying to better this one!   Also good section on basic HOW TOs for GPL.  If you are stuck, this is a good place to start.

For when you have a few days to spare, the most complete GPL related link page, you can't beat this one!