I have booked several SW flights since January 28, 2011, and all my tix since then have said, "Unused travel funds may only be applied toward the purchase of future travel for the individual named on the ticket."
Checked on FlyerTalk - then called SWA to confirm. The Jan. 28 policy to use funds only for the name on ticket has not taken place yet, even though all tickets state such. Sorry. Carry on................