You're talking about having mutiple people logged into X at the same time
right?

Simple, for GDM, edit /etc/gdm/gdm.conf, go to the bottom of the file, the
last line is something like:
0=/usr/bin/X11/XFree86 vt5 -deferglyphs 16
(In my case, I only use 4 virtual consoles so my X display is on vt5.)
Add a line:
1=/usr/bin/X11/Xfree86 vt6 -deferglyphs 16
and gdm will manage a display on vt5 and vt6. Switch between them with
ctrl+alt+f5 and ctrl+alt+f6. 
add another line:
2=/usr/bin/X11/Xfree86 vt7 -deferglyphs 16
and gdm will manage a third display on vt7.

Is that easy or what? (Configuration for KDM and XDM is similar, but I don't
have either installed so I can't glance at the config files. Same thing
though, just add a line for each diaply you want *DM to manage. 

If you need more displays, you can disable virtural consoles by editing
/etc/inittab. 

Now for the real fun, get yourself some gigabit ethernet, and pentium 200
with a good video card (vodoo2 or 3, g200, g400, whatever.) Enable XDMCP on
your other box. On the 200, set up linux minimally and have it's Xserver
query the other box. Login, and play Quake3 over the network. Heh, I don't
know if gigabit ethernet will handle GLX, would be amusing though. :)

Ok, go pratical. Get a 468 with a good video card. Setup LTSP
(http://www.ltsp.org) on your other box. All the 486 needs is a video card,
a nic (with a boot rom), or a floppy drive (if you don't have a boot rom.)
No hard drive required. You have a fully functional Xterminal. 

2000 server and XP can do this, but RDP is limited to 256 colors. (Maybe XP
imporved this?) Besides, you don't have to pay for it. Linux (and Unix in
general) would kick serious ass as an application server if the managment
tools for such a setup were on par with those in the windows world. 

--
Andy Zbikowski, Sys Admin   | (WEB) http://www.ltiflex.com
LTI Flexible Products, Inc. | (PH)  763-428-9119 (EX) 132
21801 Industrial Blvd       | (FX)  763-428-9126
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