Yes, this would be great to have - particularly for standardizing entries as someone else said above. The greatest majority of our members are from the USA but we have some in Canada and abroad.
First, since there are a bunch of different ways to abbreviate our country, It would be great to standardize it "USA" and have done.
Second, we would love to be able to have all 50 States, Puerto Rico, and the Canadian Provinces listed, also for postal address standardizattion. Also would love to have an option for "Other" wherein a member could type in his entry as necessary. (Most other countries we mail to don't use a State/Province in their postal addressing, but we have to make it a required field because of USA and Canadian members.)