SO, apparently I don't quite have the hang of the Seed Swaps tool... I thought I had set trading to begin tomorrow, 1/8, but it looks like trading has been enabled...
If you want to call "dibs" on something that has been posted, Go for it! I think people will continue to add to their lists (sure hope to have more than garlic chives listed before the swap date, myself, LOL). I'll change the "ticket" multiplier to 2 after the weekend, to give folks a chance to catch up.
Don't stress about the pre-party swapping. It's useful to have some seeds sorted out ahead of time, but there will be plenty of unclaimed seeds still available on party day!