There is also an organised effort to create more critters for Fonline, which will have allot of cross over resources for FO2 modding (they are working with FO2 FRM as well), so it is worth watching their progress as well. Incidentialy there are some interesting new critter sprites on their web forum.
In related news, Bogreleased an intersting new program, which allows for the easy recolouring of existing sprites.
Timeslip has released the Sfall source code again under GPL. She has created a SourceForge page for the project, which will allow for easier casual contributions from other talented coders like Ray.
Unfortunetly in the latest version of SFall two features where lost because of GPL licencing issues (from what I understand):
Removed eax support
Removed win9x support
EAX was a potentialy awesome feature, which no one ever used. It's a real shame.
The modders pack on the new homepage "contain[s] sslc and other stuff that's useful to any modders making sfall using mods." - Timeslip