Over in Calgary, Tara Strong and John de Lancie joined a brony specific panel to talk all about their places on FiM's cast of awesome voice acting. Usually when you see these two, it's part of a larger, more broad set of questions. This one is completely pony centered.
Check it out after the break! The video quality is a bit low, but the actual audio works well enough!
Bronyville also has the audio up in HD over at their site.