jrundle,
Search engines vary widely on which data they present as a summary and how they use keywords.
White on white would probably work because I doubt that search engines would be smart enough to look into external css. However, having said that Google, for example, doesn't seem to examine your preamble for keywords. Your best chance, other than the site name itself is what is in the title bar. It is a complete waste to say "home page".
These things change and it is unwise to listen to anecdotal (sp ?) advice (including mine). Try it for your self. What I mean by that is, for example, if you want to be recognised well on google try one approach and then even though you may not at first get a top listing you will get a listing and you can look at it and see how they used your info to list your site.
I hate to say this in a thread were my good friend Chris Hunt is posting (and he does mostly give very good advice), but the most consistently useful way of getting your summary listed (which you may not want to have as the first thing on your homepage) is via the noframes tag in a frameset. I do not consider this cheating since in handhelds and other noframe devices, you really need to compensate by giving a summary of what your site is about.
I am gradually configuring all my sites to work on the blackberry as well as in a regular browser. My mainsite already does. Without the noframes summary it would be hard for a blackberry user to decide what your site was about since you do not usually provide info in the frameset page.
Experiment!
Clive