Don't know if you've heard about it yet, but Pakistan has been hit with some awful flooding, and while I don't know much about it I heard recently on the news that the impact is worse than several recent natural disasters combined. So if you haven't yet, please go check out help_pakistan and at least look over the offers - there's everything from fanfic to fanart to miscellaneous things like cookies, jewlery, muffins, postcards, scarves, and much more. Some bids are starting at as little as $1, so even if you don't have much money to spend go check it out and see if there's anything you'd like, as there's a lot of awesome stuff to bid on. Or, of course, you can offer up something of your own to have people bid on as well.
(If you want to help but there's nothing you particularly want to bid on and nothing you want to offer, they also have a list of charities you can donate to.)
Bidding ends 11:59 PM SATURDAY, AUGUST 28TH EST.