1. Worgens have no racial mount. They drop to all fours and run. I imagine Blizz will try to even the numbers of Alliance vs Horde mounts for the achievements in a way other than Worgen mounts, but for now we should just try not to stress about it. They've gone to extreme lengths to even out mounts in the past and there's no reason for them not to do the same now.
2. Female Worgens are now live on the Beta. I already petitioned my brother to send me screenies, so expect that later today. Meantime, here's a video to whet your appetite.
3. Horde guild mount is a scorpion and has both an image and video.
4. Worgen male dance is Justin Timberlake. I imagine this will renew the clamor for dance studios.