Okay, the rules: if you donate anything, I'll spend some time working on the site this day (adding content, implementing new features, etc). Of course, I'm planning to be working on the site anyway, donations or not! However, I jump from project to project way too often (and rarely manage to finish anything), so donating money is a good way to make sure that I'd feel obligated to keep working on this one. If I find out that it doesn't work as a motivation, I'll stop accepting donations.
Just in case, 1000 rub. is 14$ (or 12.5€), and you can choose any amount below 15000 rub. I'd put a Paypal button, but Paypal doesn't allow receiving money in Belarus.