A recent question on the RootsWeb FreePages mailing list asked about a template for a Pedigree chart written in html that could be posted on their web site. While I personally prefer to post my GEDCOM on WorldConnect and have it formatted as a pedigree chart, I have collected all of the links posted by members of the list for future use.
Example: My grandmother’s pedigree formatted as part of my WorldConnect database.
From Pat Asher: http://freepages.computers.rootsweb.com/~pasher/pedsamp.htm
From Nick Reddan: http://members.iinet.net.au/~nickred/birthbrief/a1.htm
From Elaine Johnson: http://www.ida.net/users/elaine/pedigre2.HTM
I also found one you can download from Microsoft which is an Excel Template. You could then print it to a pdf file and post it on your site.