After more testing I returned the Bolt flash.  It worked quite well, but was not real consistent when used with the Radio Poppers.  I replaced it with a 430EX Canon unit to function as a slave.  The Radio Poppers will hopeful work better with it than the Bolt.

The 580EX is working very well.  I have been photographing high school and college basketball, and getting good images with the 40D/580EX combo.  the 18-135 lens is performing well and the autofocus is doing a great job.

These are taken at ISO 800, 1/250 at f5.6