Truly one of my favourite new features; Wonder Trade is something I've thought would be cool in Pokemon for ages, but never thought they'd do. You send a Pokemon. You get a Pokemon. The rest depends on who is doing the trading. And of course, more often than not, you get stooged with a crappy lowbie scrub. I've gotten some cool stuff too, like a Gengar and a level 45 Scyther, and considering you pay as much as you can be bothered paying on any given trade, there's a controlled amount of risk involved.
I also did this to help try and make things more fun for people...
What has Wonder Trade been like for you?