Mardi_Gras - 12:35 am on Nov 5, 2002 (gmt 0)

My original intention was to try and benefit from the perceived advantage for <H1> on my key phrases without seeing any difference when viewing the page.

I think this all gets back to the three most important aspects of SEO - content, content, and content.

If you plan your content carefully - with thought to SEO - you will be able to use those H1 tags appropriately, and not as the tag equivalent of hidden text.

We do use CSS to maintain control of the size of the tag - standard H1 is way larger than anything we normally use - but it can be worked in as the header to the main body of text. So if your keywords are appropriate as the headline on the page, you can easily use H1. If your keywords are NOT appropriate as part of the page headline, maybe a little re-write is in order.

It does making planning a page a little more difficult - but I think you will find the effort worthwhile.