Extras might really be limited to T-shirts, jeans and sweats.

FORBES: Scanty Fashion Not Just Inappropriate for School

I'll be doing all my extras in training and I won't be leaving.

BBC: Atkins happy to stay at Wakefield

Cramming superfluous (or useful) extras into GPS receivers definitely isn't new, but Mainnav's trying to go out a bit further on that limb by adding an interesting feature that could actually be put to good use in the right situation.

ENGADGET: Mainnav MG-920 Bluetooth GPS receiver touts FM transmitter