Fannie Mae and Freddie Mac recently announced a number of changes aimed at expanded use of their affordable housing programs by adding some of the hottest nontraditional mortgage features in the market and making these programs look more like their standard business lines. The biggest changes were at Fannie Mae, which updated its MyCommunityMortgage program to include 40-year, adjustable-rate, and interest-only mortgages. Freddie Mac also mirrored some of Fannie’s changes with additions to its…