Thanks for replying. Based on my attempts to get this to work, I
think you are correct. But, it does appear to say (in two places) on
the PocketWizard site that this can be done.


I think the second quote says that I need a flash mounted to the MiniTT1 to get this to work but I am still a little unclear.






1) Will optical slaves work if one flash is fired with a PocketWizard?





Yes they will.However if you work where others are using flash,
(weddings, parties, etc.) you are better off using PocketWizard radio
slaves on all remote flashes to "close off" your lighting system to
other cameras and flashes.


http://www.pocketwizard.com/support/faq/





2) Can I use the new PocketWizards and the Canon IR system at the same time?


You can use the optical triggering of a 580EX (I or II) or an ST-E2
in the shoe of a MiniTT1 or FlexTT5 for optically controlling slave
group A. You cannot use it for slave groups B or C. This is because
the ControlTL system is reducing the use of flash energy for
communication so you can trigger more quickly and waste less batteries.


http://www.pocketwizard.com/products/transmitter_receiver/36/TT1-C/faq/