A couple of quick tips. Having the emotions feature is so cool and getting the eyes to move around a little just adds even more to the performance. The way forward is to roll out the "lookat" command and have your character lookat at dummy axis. Send the dummy axis on a little romp around a path and you'll be set. Note; if you activate the Display/Targets mode you'll see the eyes are looking at the centre of the bounding box (of the dummy axis). This means the eyes won't actually look at the dummy axis, but rather off to one side. So, take the dummy and scale it right down. Reducing the dummy axis size also reduces the bounding box and gets the target much close to the center of the axis. Remember you can also tweak the scale of the path and the duration of the move to obtain some different eye movements. One more tip, I found that when it came to render, there was a real twitchy action in the blinks. It did seem related to the amount of emotions active in the timeline, but still, it wasn't much chop. Anyway if you set your render to 12fps the twitching gets sorted out.
Oh btw click on the image to see my little test clip, then check out this cool clip as well.