Can we have a universal Post Page and decide the post destination on the fly?

We are looking into an implementation where we dont want to have the New Message option on every boards page, but rather have an option called Ask a Question on the home page, which when clicked takes the user to the post page, and there we have a Rich text editor as the default one, and a drop down section from which user can select the board where he wants to post this thread. Doable? The screen shot is below: