Do you need to redesign your existing and so called sucessfull website? Do you think your website is full of nice features and modern technologies because it uses Flash or Frames with a splash screen? Think again.
All Flash
Although there have been significant advances in Search Engine technology and they are beginning to read some flash, a site that's all flash is likely to be dreadful for Search Engines. They will be pretty, but the Search Engines won't rank them highly because the content is essentially unreadable. But what about major corporations that rank highly but have flash-only sites? These sites have such a high rate of linkage that their flash content probably doesn't matter, unless you can compete with a major corporation, an all flash sites is a no go.