Just a word of caution... don't under-estimate the importance of their warning, "This date is subject to change. Please check back frequently." I've been personally burned by SWA pulling in that date after I made note of the original date and not catching the revised date 'til after it passed.
Their current prediction is for 2 1/2 months away... that's a lot of time for them to change their minds. I've got outbound tickets for April (the window that just opened up) but the return date isn't yet available, and it's school vacation week up here, so I've got the "flight schedules" page bookmarked so I don't miss the cheap seats the minute they go on sale.