CyBranding-Hashtagify Partial Redesign - Web App

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This customer received 64 web designs from 7 designers. They chose this web design from Lauren as the winning design.
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Web Design Brief
Are you able to apply your creativity to an existing layout? I’m convinced that even just a few touches can make a big difference to add personality and professionalism to a website design, and I’m looking for someone able to use existing ideas and bring them to the next level while keeping inside some given constraints.
The actual job is to improve an existing design concept and to apply it creatively to a landing page, a simple home page, and an older web app (single page website).
To help you start with a clear picture of the current situation and of my requirements, I created a detailed brief with screenshots, live examples, and complete instructions. You can find it attached to this job.
My tastes are inclined towards clean and simple designs. For this project I'm not looking for dazzling novelty, but for very solid craftsmanship. Are the right man - or woman - for the job?
Updates
I wanted to thank everybody who participated in this project. I made a choice, but also other designs were interesting. Hope to work with you another time.
Added Saturday, December 01, 2012
Target Market(s)
Our main target is social media marketers and startuppers
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.