Ask a few people that you would expect to know about something like this and if none of them have heard of it then practically speaking it doesn't exist. The added bonus is you can see if these people think it would be useful.
I think you also need a valuation for the company so that as they continue to put money in (and assuming you will not) you know how much you should get diluted by.
Yeah. That is cool and I was thinking the same thing. I also thought that the more real time it will be the better, so you can get into the discussion while people are still reading it :).
But is the app store (like Microsoft Windows) a good thing from the perspective of the users? App store makes it easier to buy software for the users. Even if it makes life harder for the developers. It also lets developers get paid for stuff that otherwise might be hard for them to get money for.
You are protecting against spam right? Or why would you want this? You might try testing alternative question posting options and see which gets a high follow through. Obviously you want some way to protect against spam but by adding as little overhead as possible. You also have captchas in the registration - maybe it's enough.
I like how you can post your question and it gets you to sign up slowly step by step.
UI is pretty nice and also fast.
About us should have some more meat.
FAQ and Contact us at the top don't work.
Should have a similar quick way for tutors to get started like you have for questions.
Clicking on cost to sort by cost causes an exception.
Overall maybe a bit too many rows with links which is a bit confusing. Maybe simplify the navigation a bit.
Why have the see all categories? Why not just show them all? NOt that many anyway.