Smart to use keywords in company slogan?

[Fuzzylogic]

Just curious how much of a company's slogan - the short blurb you see right underneath the company name usually - impacts the overall site in terms of traffic. It would likely be in your header or show up for SEO purposes somehow, so it seems it would be better to try and huge high-value keywords for your niche site.

Anyway just curious and coming up with a slogan for a new site, and thinking a lot.