$150 - Logo needed for E-Commerce Site (needed fast)

A new website I'm planning on starting up will be selling posters via eBay and an e-commerce store. The site will need a logo, and soon I will make a contest for the website design. Also, don't be afraid of any negative criticism. If I give any negative criticism, learn from it, fix it, and maybe you can become the winner!

Desired Color Scheme: (green, orange, purple), (ocean blue color), or (blood red color) Desired Style: Web 2.0 style, the text should have some sort of effect or something happening to it. (No plain text with something next to it) Accepted File Formats: Illustrator .AI (preferred) and a Photoshop PSD. Kerta.com is the name of the store. The product that we will be selling is mainly posters, with some calendars and other similar stationary items. The targeted demographic is college kids, so consider that in the design. I am considering either a very professional, web 2.0 theme with either bright wacky colors (green, orange, purple, etc), an ocean blue color, or a blood red color.

Every design category has flexible pricing for all budgets. Logo design starts at £239.