Does Google recommend working with companies that offer to make my site Google-friendly? todays article part2

Ask for explanations if something is unclear. If an SEO creates deceptive or misleading content on your behalf, such as doorway pages or "throwaway" domains, your site could be removed entirely from Google's index. Ultimately, you are responsible for the actions of any companies you hire, so it's best to be sure you know exactly how they intend to "help" you.

You should never have to link to an SEO.
Avoid SEOs that talk about the power of "free-for-all" links, link popularity schemes, or submitting your site to thousands of search engines. These are typically useless exercises that don't affect your ranking in the results of the major search engines -- at least, not in a way you would likely consider to be positive.
Some SEOs may try to sell you the ability to type keywords directly into the browser address bar.
Most such proposals require users to install extra software, and very few users do so. Evaluate such proposals with extreme care and be skeptical about the self-reported number of users who have downloaded the required applications.

Choose wisely.
While you consider whether to go with an SEO, you may want to do some research on the industry. Google is one way to do that, of course. You might also seek out a few of the cautionary tales that have appeared in the press, including this article on one particularly aggressive SEO: http://seattletimes.nwsource.com/html/businesstechnology/2002002970_nwbizbriefs12.html. While Google doesn't comment on specific companies, we've encountered firms calling themselves SEOs who follow practices that are clearly beyond the pale of accepted business behavior. Be careful.

Be sure to understand where the money goes.
While Google never sells better ranking in our search results, several other search engines combine pay-per-click or pay-for-inclusion results with their regular web search results. Some SEOs will promise to rank you highly in search engines, but place you in the advertising section rather than in the search results. A few SEOs will even change their bid prices in real time to create the illusion that they "control" other search engines and can place themselves in the slot of their choice. This scam doesn't work with Google because our advertising is clearly labeled and separated from our search results, but be sure to ask any SEO you're considering which fees go toward permanent inclusion and which apply toward temporary advertising.
Talk to many SEOs, and ask other SEOs if they'd recommend the firm you're considering.
References are a good start, but they don't tell the whole story. You should ask how long a company has been in business and how many full time individuals it employs. If you feel pressured or uneasy, go with your gut feeling and play it safe: hold off until you find a firm that you can trust. Ask your SEO firm if it reports every spam abuse that it finds to Google using our spam complaint form at http://www.google.com/contact/spamreport.html. Ethical SEO firms report deceptive sites that violate Google's spam guidelines.