If you work with SERPs (Search Engine Result Pages) as a SEO (Search Engine Optimizer), you most definitely examine the client or your copy to make sure you have an adequate weight for the search engine bots.
KGen is a side-panel extension that takes the current web page you're on and gives it a weight by counting all of the words and showing the results in a grid format.
When I installed it, I navigated to a site and activated the extension through the View/Sidebars/KGen pulldown menu. I immediately pressed Scan It! and it gave me a weighted word list (the most popular words on the page).
When you receive your words in the grid, you have the option of copying your weighted results to the Clipboard. This is perfect for you Excel jockeys. Analyze to your heart's content.
KGen is great for bloggers who want to maximize their effectiveness through their writing and trigger a feeding frenzy from Technorati or Digg.
KGen should be a standard utility or plug-in for blogging sites. This would allow authors to sharpen their document to their targeted keywords for the search engines.
The extension is definitely great for clients and site optimization.
I'm holding on to this extension.