Design chat support popup window

OnClick Solutions Ltd

Our mission is to provide software solutions for small and midsize businesses. We believe software should be simple, helping people to complete their work without getting in the way. Complex forms, confusing user-interfaces and hundreds of options have no place in our products.

OnClick Solutions Ltd customer support solutions are designed to help customers implement today's Best Practice procedures. Our solutions are updated continually to reflect now technology and the latest advances in business procedures and approaches.
We believe in transparency. As a small company, our greatest advantage is being close to our customers, listening to them and treating them with respect.

Web users & website owners

Need to design a pop up chat window for visitors to communicate with support staff. Only the visitor side is needed.
An example for such a chat window is:
http://www.dydacomp.com/images/live…n-chat.jpg

Elements required:
1. place for company logo
2. chat transcript body with sample chat
3. text box for typing messages with icons (bold, italic etc)
4. "operator is typing" notification
5. rating option - was it useful for the visitor? (could be a star icon or something if there is no room for it)
6. close link / button
7. "powered by" text

Looking for:
1. a clean, easy design
2. impressive design

Creativity is welcome!