I got mine from Oikos Tree Crops in Michigan.
http://oikostreecrops.com/store/product.asp?P_ID=597&PT_ID=119&strPageHistory=cat
These are "species" Jujubes, not improved varieties. The two major improved varieties are Li and Lang. The improved varieties have larger and better tasting fruit (so I've read...no experience with them). The unimproved trees have fruit that's about the size of a duck egg or golf ball. They have a soft/crunchy texture like a slightly over-ripe apple and sortof bland but semi-sweet flavor.
I don't know yet about deer preferrence for the fruit or browse.