Great post! I'd just like to comment on the content section. SEO is a very good marketing tool to draw visibility to a company's website. It is what the visitors do once they reach the website that is important to the company.

Make sure the content on the website is well constructed. Don't lose sight of the fact that you still need good material on your web pages to convert those visitors into clients!

Also get access to a good web stats package so you know what visitors are doing on your website. What page are the seeing first, where are they clicking to, where are they leaving, etc. This can be invaluable information when building a web marketing campaign.

Cheers!