NetBSD 2.0 -- it is easy!
 

Finally, I installed NetBSD 2.0 on and old AMD K6-2 machine to be used as firewall/router(NAT).

Installation was VERY EASY. Easier the Slackware if you know what you are doing. It gives me a sense of lack of control. Slackware installation gives me more control. As I just said, it is a sense only. I know I can control it better if I have installed NetBSD as many times as Slackware. :D

Still stumbling here and there with configuration.

Something which is norm in Slackware becomes unavailable in NetBSD, such as BASH, lscolor, emacs, etc. Well, it is a matter of time before those things go into that machine.

The next machine would be a FreeBSD for *servers.

Oh boy, it is a very steep learning curve... ummm adaptation curve for me trying to configure NetBSD.

It is alive and kicking... NAT and firewall is not up yet.. pppoe has been configured but not yet tested.

Well once you have it all setup you will barely need to look at it again.

Not sure about 2.0 but I have 1.6.2 doing all those things (and dhcp + named) and it is a breeze. The online documentation is wonderful.

Yuh, the online documentation is great. But I wish the system comes with initialisation script files and documentated like Slackware. :)

Very impressed with the kernel though. Had some kind of panic and the system when into this green font debug mode.

NetBSD installer sucks! I installed it after FreeBSD 5.3 and no match, no match.
Fast, however....

Well.. my consolation for NetBSD is that it is to be used as a firewall/router and nothing else. :) So, once setup. It will be good to go as long as the hardware can hold up. (Kinda old hardwares)

Yep, NetBSD installs first just the base system (plus XFree86, if you choose) but nothing more. You need to download all the additional software from the NetBSD packages collection (called pkgsrc). However, once you download the pkgsrc tree (/usr/pkgsrc), installing additional software is just as easy as using the ports system in FreeBSD.