Bread-Bakers v006.n046.1

I would like to put together some bread mixes as Christmas gifts for 
friends who have a bread machine.  I've never done this before and 
was wondering if anyone had any experience with this they could 
share.  Some of my basic questions are:  How long will the mixes 
keep?  Could yeast be included in the mix or would the receiver need 
to add this?  What are some of the recipes you used?

TIA, Kelli