The last two years have seen Saints travel away from home on the opening day, visiting lovely places like Dundee and Inverness. Logic would dicate we're due a home game to start off with, but this is the SPL we're talking about. It wouldn't surprise me if we get Dundee United away, which has to be moved to accomodate a Dundee home game.
Alternatively, based on the SPL's super duper way of slightly altering the previous season's matches, we'll have Rangers on the opening day.
Sadly, Mirren Mad won't have news of the fixtures online until the evening, so you'll need to use another site until then!