There might be a section later for (current or former) employees to review or answer questions about their company anonymously, but that'd be broken out.
Honestly, that seems to kind of defeat the whole purpose, doesn't it?
I'm assuming that questions are all going to be more-or-less standard. The value is in the "ugly" but true answers (e.g. the product manager is an idiot and management is a disaster, and the product will implode within a year), which no employee would ever sign their name to.
So what kind of value is this site attempting to provide, in the end? Is it trying to simply be a database on workplaces? I don't really understand what having anonymous questions has to do with anything.
However with anonymity it would be very open to shilling.