Manufacturer's specifications
From Gumstix User Wiki
PBA31308 Rohs-compliant Bluetooth module specifications
Infineon publishes this PBA31308 documentation
SMSC ethernet module
As of the Spring 2007, Gumstix uses the SMSC LAN91C111 ethernet module for the various 92-pin and 120-pin expansion boards. The manufacturer specs for the SMSC module are posted here.
Wistron antenna used for wifi and verdex Bluetooth
The document has been posted here.
Posting of this document to a gumstix wiki page was approved in February, 2007 by Kenny Young of W-Neweb Corporation in San Jose, California.