Honestly, even without the search function, I think this is one of the most base level functions of Google's toolkit. Everything else is just convenient
I want to move my radio station away from google so badly, and if you can add email hosting, even just a pop server I can start pointing my new address to you. As it is, I want to sign up without having to use another service (which is going to be google, let's face it) and it would be great to have this all stored in one place.