Copywriting web app

I've just completed homepage redesign for my new client from Czech Republic. It's going to be a new web app for copywriters where they can reach clients or offer their services.

Tasks from client were:
- Use ONLY white colour if it's possible, any big grey areas
- A lot of whitespace around elements, use 960px grid
- Simplify homepage and push visitors directly to registration

Description from the top to bottom:
A few menu links in the top, login button which opens up login form, main are with 3 icons for each category (Picons used here), 2 tabs that allows you to switch if you are client/copywriter (this will change the bottom content of the page), few bullets with main features, registration form in the right, realtime feed with already registered users, footer links with Twitter link.

+ There will be a nice animation in the headline with blinking typing mark and animation will overwrite the headline each 5 seconds to different sentence

I would like to hear your feedback, full view attached!