I haven't hit the site yet, but contrary to popular belief Flash sites can be SEO friendly as long as you keep to a few basic rules, such as importing the bulk of your content as XML and not images (although Google can OCR images... sort of).
I would definitely recommend putting a straight up HTML version of the site (or at least the important bits) inside of <noscript> tags. Then on those pages you can embed a little javascript that tests for Flash capabilties and redirect as needed when a real browser clicks through.
Navigation inside the Flash object might be tricky, but you can capture some of the anchor link love from the search engines with <noscript>.
Hope this helps, and good luck!