This article is from the Stand-up Comedy FAQ, by Steven Rosenthal and Steve Silberberg (firstname.lastname@example.org) with numerous contributions by others.
A. There is currently no Usenet group specifically for comedy writing.
Comedy writers are encouraged to use alt.comedy.standup for that purpose.
Since there is a huge overlap in the two venues (stand-ups usually write
their own material) comedy writing is often discussed in the newsgroup.