It sucks when people don't take communication as seriously as you do with regards to swaps/sales.
Alsaxon, it looks like it took your swap partner 4 days to respond the first time, so I'd say it may take her 4 or 5 days this second time, too. Not the best gauge, I know, but that's about all you can on. If you haven't heard from her in 5 days (not counting the holiday), then I'd report her here. Especially since you've mailed out your items already.
Is she a new member, or one with few posts, or both?
I know other people may not agree with me, but from experience, my few bad transactions on here have been with members who had few posts and had not been members long, which leads me to rethink conducting transactions with anyone who's post-count is under 50 and who hasn't been a member longer than a month or so. (That's my own personal rule, but I don't even look at a swap posting after I see that it's been made by a member not meeting my criteria.) I also refuse to submit payment via Paypal as a "gift" - newbies (or scammers) will try to avoid Paypal fees by asking you to do this; legit swappers/sellers know that you can't sue for a Paypal refund due to not receiving your goods if you send money as a gift.