A few curious things have sprout up on the Warlords of Draenor beta I haven't seen discussed anywhere else. Namely, hints that we may see a greater Infinite Dragonflight presence in Tanaris! An "Infinite Vanguard" seems to be scoping out the Caverns of Time. He is a level 90 mob with way more health than your standard level 90 mob, as well as two custom abilities - "Vanguard Chain" and "Vanguard Strike".
Further in the wastes, a small Infinite rift seems to be opening. It's quite small and out of the way, but an eagle-eyed player spotted it earlier and I was able to find it as well.
Update 1: Added video.
Update 2: Infinite Whelplings & Pesterwings have appeared both outside and inside the Caverns of Time. Credit to BlizzPro for noticing this.