The Hub has a voting site up for you to select your top 10 MLP: FiM episodes thus far from a narrowed batch of 20 and the top voted episodes will be aired on the Feb 11 Mare-A-Thon.
Voting is at
http://www.hubworld.com/hubworld/specials/mlp-we-heart-ponies/#tTop of my list is Luna Eclipsed.
Oh, and you can vote up to 10 times every day, so you can effectively vote more than once.
