jdMorgan - 9:03 pm on Apr 26, 2002 (gmt 0)
I'm no SEO expert, but yeah, 600 characters is kind of long.
Many (if not most) search engines now disregard the meta keywords tag, so rather than trying to put every possible combination of every possible variant of "TV Listings" in your keywords tag, just put the ones you think are most popularly-used as Headers (the "<h3></h3>" tag, for example) for those sections of your page. Search engines look for headers, and give them a bit more weight than plain-text.
The quickest way to lose your sanity is to "sweat" the keywords - just put a few of the keywords and phrases that real people will use when searching for your information, and don't try to figure out ALL the possible
Once your site has been up for a few months, you can review your access logs and find out what keywords people are actually using to find you. Then you can make an informed decision on whether you may want to re-arrange your keyword list.
Years ago when keywords were actually used by SEs, repeating any keyword more than 3 times was a good way to get your listing dropped from their indexes. But now, only AltaVista seems to pay much attention to keywords, and no-one seems to be using AV much anymore - so again, don't sweat it!
Hope this helps,
(Finally recovered after many years of attending "Keywords Anonymous" meetings)