with my mind in the gutter I read from chiyo :
I scrolled back looking for a pervy poster, but couldn't find any.
$100 would get you a decent SEO to discuss the specifics of a plan of action. Or one post here will probably get you the same, but from 20 different voices.
The bottom line is do SOMETHING with the money. In light of the Yahoo/Inktomi I'd probably speculate for 3-4 inktomi subs for the most relevant pages in your site, then go get another $100 and do the links thing, then another $300 and do a Yahoo directory sub. It all adds value, and if it isn't obvious how it does then it's obvious to leave it out of what you should do.