Ok, since your not getting much help here I ill ry to throw a few things your way. Interviewing is difficult when coming out of residency and for me it was really just a gut feeling that made me choose one group over another. I left that group however, but not totally because of the group. So here goes.
1. Questions: You should ask everything. I wouldn't hold back. vacation, salary, partner salary, benefits, bonuses, who pays what(malpractice, health, etc.). How many people have completed the partnership track and what percent were made partners. This is a biggy. Some groups will keep you until partnership then let you go. If they don't have close to 100% then be weary. I would be very careful before signing a contract with anything more than 2 yrs to partner, 1yr would be ideal but unlikely. Ask about the sites and number of locations. How much time running from one site to another if they do more than one site. Hours per day on average.
2. Question they will ask: Everything. What cases do you do? How do you do them? What cases are you uncomfortable with, comfortable with, like to do, etc.? Why are you interested in their group, town, hosp., etc.? Are you planning to buy a house? Do or have you worked with CRNA's and what is your opinion? blah blah blah
3: Malpractice: Ideally you would have them pay it and it would be a "Claims made" policy ( I think this is right, someone will correct me if I am wrong, JET!) so that you don't have to buy a tail if you leave or are let go. If not try to get them to commit to paying your tail if you leave. Good Luck.
4. Loans: If you have outstanding student loans, try to get them to pay some of it. Also unlikely but you gotta ask. If not then you can consider withholding from your check the loan amount for them to pay and then you don't pay taxes on that option.
5. Billing: This is very important. Do they pay you a salary or do you bill on your own and collect and everything else. I really dislike the later but I understand the need to bill on your own in some groups. If you will be "Eating what you Kill" then you want to know who makes tha daily assignments. It should be evenly distributed. If not you will get the medicare/caid and no pays.
This is all I have for now. If you have specifics, post it here. The others (JET) are probably alot better at this than I am. I just do anesthesia.