MoGo Mouse was a Bluetooth travel mouse that can be attached to the PC card slot so that you don't have to throw the mouse when the battery gives way.

But still the main problem with the mouse was that the device was not compatible with ExpressCard that made it useless for the MacBook Pro or any other laptop that was equipped with the ExpressCard.
The company is now addressing the issue with the refurbished MoGo Mouse X54 that has been made compatible with the ExpressCard slot. The mouse should hit the shelves in the second quarter of this year with a price tag of about $79.99.
Via: engadget