Those of you who are eligible for the Mad Scientist Outfit and/or the Combat Academy survey XP reward from the EoC Beta will receive your items today!
On log-in, you will receive a notification (or two notifications if you are eligible for both items) in your message box and you can collect your rewards from Diango in Draynor Market Square.
If you took part in four or more Combat Beta events and - as such - are eligible for the Mad Scientist Outfit, you just need to ask Diango for any outstanding holiday items he has.
If you're eligible to receive the XP reward from taking the Combat Academy survey in the EoC beta period, he will tell you he has an item for you, and the XP can be acquired from the dusty tome he will hand over. Simply activate the item and choose the skill in which you wish to receive the XP reward, which will be ten times as much as you'd receive for redeeming a Jack of Trades[help] reward in that skill!
Thanks again for your participation in the Evolution of Combat Beta. Enjoy your rewards!