Not sure where this comes from for snake strike:
Benefit: Once per opponent per combat, as a free action, you may draw 1 weapon you have not yet used during the current combat and take a Feint action. If this action is successful, you also inflict 1 die of sneak attack damage with your next successful attack against the opponent using the weapon drawn. This benefit is lost at the end of the current round.
But the wording on my copy of FC goes like this.
Benefit: Once per opponent per combat, as a free action, you
may draw 1 weapon you havenít used during the current combat
and use it to Feint 1 opponent. With success, your attacks inflict
1 die of sneak attack damage until end of the current round.
It says attacks, meaning plural. If a feat grants you an ability to attack 4 times such as flashing weapon, does this mean the added sneak attack dice is applied to all 4 attacks? (whether flatfooted or not)
What Desertpuma said notwithstanding that is some impressively powerful thread necromancy you're throwing down! January 2008! And the post before that July 2007! Anyway, I doubt that was a typo, the answer is very likely yes it applies to all four if they're made within the confines of the feat (the current round), still, you should put stuff like this in the FC forum, heh.
Edit: Keep in mind FC is Mastercraft, SC 2.0 isn't, so even though there are a lot of similarities you can't always look to one for clarification on the other (Though this is, admittedly, sometimes possible).