I've been helping small companies to decide on blog names, domain names and company names and I am putting together a report on this. Really the three are best decided upon and researched at the same time. A big influence can be the question of trademarking. It is best to avoid violating the trademark of another company and it may be useful to think about trademarking a name.
You can sign up for my report by click on Naming a Business, Blog, Domain, Company page.
