Strange Horizons is conducting its annual fund drive (which is a major component of how they can afford to pay their authors pro rates). If you donate, you’ll be eligible to win one of a number of nifty prizes; that list there is only the tip of the iceberg, with more being added throughout the month. (Including, yes, a few of my own books. 🙂 But they’re the least of what’s on offer.)
SH publishes a lot of high-quality short fiction, so go forth and donate!