I'm not a huge fan of creating sites with Adobe's Flash. I personally find Flash sites difficult to navigate, bookmark, and retrieve worthwhile information. However, I can understand why the more artistic Web designers and site owners out there prefer to use Flash when building a website. But in my mind, one of the biggest drawbacks with Flash is that Google and other search engines have a difficult time reading and indexing Flash sites. Let's face it, if Google can't search your site then it is highly unlikely your customers will find your site in the first few pages displayed by Google no matter which keywords are being used.
Luckily for Flash fans, Google has changed the rules by improving their search capability for Flash sites.
Google has been developing a new algorithm for indexing textual content in Flash files of all kinds, from Flash menus, buttons and banners, to self-contained Flash websites. Recently, we've improved the performance of this Flash indexing algorithm by integrating Adobe's Flash Player technology.
In the past, web designers faced challenges if they chose to develop a site in Flash because the content they included was not indexable by search engines. They needed to make extra effort to ensure that their content was also presented in another way that search engines could find.
So there you have it. I just lost my number one argument against building a site using Flash technology. Web designers and site owners will likely want to read Google's questions and answers pertaining to the improvements with Flash indexing.