Or be a real internet pillar and OFFER an HTML version of the site. Making your site "FLASH only", limits your hits on search engines, and decreases the number of people who can veiw it (that is those who can find it and veiw it will be severly limited). Remeber that there are a lot of TEXT ONLY browsers, people who don't like plugins (and waiting for content to load). The best option is a main page where the USER can chose FLASH or NON-Flash version.
Consider this: Site visits limited by the fact that the content is in flash format because of search hit reduction, site visits limited by the fact that people get tired of waiting for SWF to load and leave before seeing content, number of people with cell phones/pda/text only browsers who can't see your content even after page loads increases with version of Flash you install... Be kind, when doing a flash site, make sure that the CONTENT and NAVIGATION are both accessable with the highest security browser settings and the least plugins. Doing otherwise only limits the number of visiters you get, and the number that return... The only exception I can thik of to this rule is if the only content is the Flash eye candy... and then a message explaining to why "lower" veiwer settings can't see the page.