Logo Design for Web Hosting Company

We are looking to have a logo designed for our primary web site, company letterhead, business cards, and other various business branding. Company is a website hosting firm. Our strength is an extremly high level of attention to customer support as well as high level of security for hosted sites. As the company name is "Atomic Fission," the logo graphic should represent an atom, molecule, ion, or other physics/mathematical symbol. The logo should appear appropriate for a corporate environment and should not come off as being too extreme. The final product should be either vector or a high resolution raster format which can be enlarged to very large (0.5meter square)sizes without noticable dithering. **In order for bids to be considered, please post your portfolio or links to other logos you or your firm have designed in the past.