Hmm, I think an idea of what the goal of FC2 will be should come first.
An obvious one: switch to kernel 2.6? The goals will somewhat drive the
dates.
I think a good choice is to provide native ACL support for the file
system. many people I know want this feature a lot to control their
files on server, specially when used by large groups of people.
I don't know if the implementation is stable enough, but I think when
kernel 2.6 arrives, it'll be a good "ride" to implement native ACL
support in the file system.
I mean native = easy access and documented procedure on how to work with
ACL on files and such :)