Check out the AUR guidelines:
That's about as close as it gets to the bsd ports tree.
> How does Arch compare with somthing like slackware?
It feels very similar.
Installation is similar (test based installed from CD or ftp, about the
same level of complication).
Their are no distro specific GUI configuration tools (a good thing in my
Startup is very minimalist (it doesn't start every daemon in the world
on startup) so it starts fast and doesn't eat all of your RAM.
I tend to like to install only the base system, configure 'pacman'
(arch's version of apt) to use all of the bleeding edge repositories,
then do something along the lines of the following:
#update the base system
#add xorg and kde, don't forget to add your gfx driver (xf86-video-foo)
pacman -S xorg kde
Then you're more or less ready to go. I've found that it's a fairly