I'm a newbie 770'er.
Looks like ELPH was about right.

RS-MMC and MMC Mobile are compatible. MMC Mobile appears to be faster.
Any 770 user should check this out.......

http://www.newegg.com/Product/Produc...82E16820134119

Check user reviews.

Mine's coming Friday! ;-)

Newbie question.......
What's the easiest way to access the finger keyboard?