piatkow - 9:31 am on May 9, 2011 (gmt 0)
I run a photo gallery site (static html) and ranking seems quite precarious. Information on the home page gets indexed quite well but anything topic related seems to come and go.
As stated above proper use of heading tags, alt tags and titles all help. Also make sure that bots can find pages through standard html.
Supporting text with images helps. Don't forget to use alt tags on thumbnails as well as the main pictures.