Steak can answer this one but I can give a few details:

EMB: Current bases are ISN (Williston, ND) and DEN. Not sure how long we'll keep crews up there but I'm thinking probably not after Feb '14, but that's just my opinion. Commute up to ISN has gotten much easier with Expressjet and Skywest also operating up there. We are fairly full out of DEN and weight restricted too, so having additional seats is helpful.
Schedules are hit or miss each month. They send the EMB where they can fill it, so we only go to a certain number of cities. Sometimes they increase or decrease capacity depending on the time of the year. Average days off for a line holder are 11-13 days off, but I've seen more. Average flight time is 75-80 with a little more or a little less. With the FO's leaving, I'd say holding a line immediately is very possible.

I enjoy the EMB, but I'm biased. I've been on it 9 out of 10 years.