DWAlphaGam - that's pretty much the point I was trying to make. OK, she can't vote, but she can still go to social and sisterhood events, and do a lot of the things a collegiate member can do. It's probably more like 3/4 of a loaf.
33girl - that's a good point about age, but if she's ineligible to join a particular sorority through the "conventional" collegiate process because she's married, her age alone shouldn't keep her out of the alum initiation process. However, something just occurred to me - some orgs that do alum initiation require that you have a college degree.
scprettygirl - good luck