Is anyones WiFi working?

I have been trying to trade with numerous people aswell as battle but it just wont accept.

I can get into the WiFi screen with it showing the Connection Strength with full green bars.
But when the Other Player or me asks to trade or Battle it just says Failed to Respond.

I was wondering if this is Nintendo being crap again.. or my computer hating the USB Connnector.

Mine has had the same problem twice too. :(