I've just put v3 of DmxSimple on Google Code.
Optimised interrupt routine now supports serial baud rates up to
DMX output pin can be changed with the DmxSimple.usePin()
Automatic support for future Arduino clock rates and pin mappings.
Syntax highlighting in Arduino editor fixed.
More comments added to FadeUp and SerialToDmx examples
FadeUp example now demonstrates all DmxSimple functions.
Release notes file added.
Download it here: http://tinkerit.googlecode.com/files/DmxSimple_v3.zip