I don’t know much about the Google site maps, but I built a simple site map for my site (just a page with a link to every page on my site for the spiders to follow) and linked to it from the index, got a few links in from indexed pages and my whole site got indexed quickly. It only takes one link to get indexed.
As a side note, anything talkcasinos tells me to do concerning seo, i take to the bank.