Mirroring one X session across multiple machines

[Brian McKee]

For training purposes I might want to show the same X session on a
half a dozen screens.  I don't have any decent hardware to work with.
Multiple head video cards are definitely NA.  I'm thinking multiple
machines each with it's own monitor - One master, a bunch of repeaters
that don't need to interact, just display.  All on a LAN.
Anybody done that?  What's the best choice - VNC? just X? NoMachine
stuff?  something else?

Comments appreciated.

Brian

-- 
All you need to know about Ubuntu 9.04 Jaunty -> gconftool -s --type
bool /apps/update-notifier/auto_launch false