BTUART on a Connex 400

From GumstixWiki

The Connex 400, which can be identified by the "Gumstix #0.8" label in between the RAM chips, does not provide access to BTUART through either of the Gumstix connectors. However, the lines are present on the Gumstix and lead to balls on the unpopulated bluetooth chip BGA.

A post on the Gumstix mailing list provides the necessary information to implement this.