Mutt Packages

[Kit Halsted <kit@kithalsted.com>]

Sorry about the volume of questions lately; I've got a week left to 
go live with the first *nix server I've installed myself & I'm 
hitting some bumps. (I'm putting my questions into separate threads 
for simplicity & the archives, just tell me if I should lump it all 
into one big bucket-o'-queries.)

I've done some research, it looks like Mutt will do nicely to replace 
Pine. I went to add the package, only to find 3 different versions 
(curses, slang, & slang/imap/pop) with no apparent explanation as to 
the differences, other than the names. A search in comp.mail.mutt for 
OpenBSD and install turns up 2 messages, neither of which contains 
the text "OpenBSD." So, 2 questions:

Is there somewhere I can find documentation for the packages?

Failing that, can someone tell me what the differences between these 
packages are?

Thanks again,
-Kit