Great information.  Thank you.

I have a two-part question:

1.  I know that bold and italicized font can help keywords rank better.  I have a block of regular text on my site that is really more for SEO than anything else.  If I reduce the font size, will it have an impact on the importance of the text?

2.  If you reduce the size of font enclosed in header tags, such as, reducing h1 text to 8 px font, does that have an impact on the importance of the text within that h1 tag?

Ryan,

Why do you say z-indexing is a blackhat trick?  I use it for my float bar on a few of my pages just to keep it on top, and it moves with the scrolling of the page.  I'm not hiding anything with it.

The reason I'm asking is because I have valuable links within scrollbar that I need indexed.  Google last indexed it today, but if I look at the "text-only" version, it only shows the visible part of the links.  Here's the page: http://www.rmtracking.com/gps-tracking-installers/gps-tracking-us.php

Any advice would be greatly appreciated.

Is an "overflow" (scrollbar) seo and Google friendly?  I only ask because it hides part of the visible text.