Interviewing with Well Funded Startup... What to expect?

I am using a throwaway account for this question because I dont want it to get back to my current place of work that I will be interviewing elsewhere, but I am just wondering as a developer from the South what can I expect when interviewing with a well funded startup in the bay area?

I know lots about the company but am positive there is much more to know, I love the product and their direction but just am not sure what to expect of their interview process etc. it will be more of a technical evangelist position than a core development team spot so i am curious of what I should be expecting out of an interview and what kinds of questions I should be prepared for.

Any help is greatly appreciated