I went to the county website and they referred me to the County Child Care Licensing Board and they provided me with a list of licensed child care providers in the area...and then I spent weeks interviewing them and going from house to house to find someone that we liked.
I ended up going with an In Home based daycare that charges $150 a week..incidentally the Kindercare around the corner charges $274 per week...so there's a pretty wide range depending on what you're looking for.
I would make sure that they were licensed (the licensing board has certain requirements, like CPR classes, they can't have criminal records, the get inspected by a state agency periodically).
I would make sure that the house was clean and safe.
I would ask about pets.
I would ask about what the hours were, what the late fee was for late pick up, what the sick policy was, what her vacation policy is, if there have ever been any complaints filed against her.
God I hated interviewing...it's not fun.
Good Luck!