Found this post http://forums.adafruit.com/viewtopic.php?f=15&t=16699
and started working through the issues for a 3gs.
Just tested with one of my boosts and one of the ipods.
Jumpering the 2 data pins had no effect
Globbed some solder between the ground and one of the USB mounting clips.
This appears to have solved my issue.
Would it be out of line to suggest grounding the USB plug in v3.1 ?