First of all congratulations on getting the job interview!! The first step is always to get your foot in the door.

Regarding the types of questions you might be asked, part of it depends upon the position you are applying for. I know that I had a phone interview this week that asked things like:
-Tell me about yourself
-What do I want in a job
-What kind of work do I like to do and what project have I enjoyed working on the most.

Generally people ask stuff like
-where do you see youself in XX years
-tell me about yourself
-what skills do you bring that will help the company

Spend a little time doing some research on the company because they will give you an opportunity at the end to ask questions and you always want to have a couple prepared.

Good luck and keep us posted on how things go