Yeah, I want that compass too...What do humidity and temperature sensors cost? How do they connect to SoCs? They might cost only a few $ and be easy to connect and use via I2C or something. Position would ideally be on the outside when Pyra is closed and when it's open and it would need a little hole for air to come in. So it seems maybe it could go next to the microphone which has similar requirements.GPS yes (in the 3G models), accelerometers I think I heard being talked about officially, gyro no idea, and compass I've asked for but not heard anything back. Now phones are also getting humidity and temperature sensors and things, but I wouldn't expect it to have any of that.
The price of a temperature sensor (not the one inside the CPU) is 1.5 dollar Not I2C though. https://www.sparkfun.com/products/10988
The usb variant is much more expensive, but has a very good manual (and you can disconnect the Pandora, but still be able to measure temperature): http://www.yoctopuce.com/EN/products/usb-sensors/yocto-temperature?gclid=CJnNpuy3n70CFWsTwwodZJoASQ