Interface Builder Tool - one page design

We are developers of open source rich internet application framework aiming to popularize and spread adoption of Open Standards in web application development. Currently working on several, web based WYSIWYG tools for rapid creation of web application interfaces and other interactive content without coding.

- web developers
- graphical designers
- business users

We need sleek and clean design for our Interface Builder project. It should appeal to not just developers, but also web designers and general, not so tech savvy users. While containing standard components and functionality interface should be intuitive and creative, probably more Mac style then MS, or could even use some web 2.0 styling.

This is just a one page design contest, but please keep attention to initial details and icons, we'd like to work with the winner until end of the project and order rest of the icons and components designs.

Link to the flash based interactive mockup (very draft):
http://files.getdropbox.com/u/31524…/Main.html

Link to the brief user requirements which may help to understand our needs from design better:
http://files.getdropbox.com/u/31524…uilder.pdf

UI structure is as following:
- Menu and Toolbar in the Header.
- Left Column with States Pane and Layers Pane
- Right Column with Library Pane and Configuration Pane which have 3 views for now, probably more in the future, so its better if icons are used instead of texts
- Designer Area in the middle with Tabs and Timelines Pane at the bottom

The default resolution for the design is 1024x768, but should fit nicely in 800x600 or 1280x1024 as well.