[LinuxBender]

Based on previous experience of registering domains for marketing groups, I would suggest that unless you are advertising on the radio and/or television, long name is fine. Short easy to type / remember domains are important if the person only ever hears the domain. Even using short names, one can redirect to the long name domain. Redirects can be useful if you are building a map of discount/promotion codes in URL's. My personal preference is to keep those redirects on the purpose-made short domain, keeping that clutter off the primary domain and out of the marketing groups CMS.