Introducing list "topics"

[Sean Conner]

It was thus said that the Great Solderpunk once stated:
> 
> Without further ado, the four currently defined topics are below.  I've
> started out with just four to keep things relatively simple, but if over
> time it becomes clear that we would benefit from more fine-grained
> distinctions, I'm not opposed to moving in that direction.
> 
> # Users
> # Tech
> # Spec> 
> # Announce

  You might want to add a topic "[ann]" to allow users to announce new
sites or projects.  That's already being done by users.

  Also, are these topic markers compared case insensitively?  Is "[USERS]"
and "[users]" the same topic?  

  It's a cool idea, and I much prefer this to separate lists.

  -spc