I accidentally landed on Alledia.com website and was glad to find a review of my SE Keywords Module.
For the full article visit Review of the SE Keywords Module at Alledia.com. Here's an abstract:

We've had SE Keywords running on Alledia.com plus two other sites and we've found the following useful result:

SE Keywords reduced our bounce rate by between 3 and 4% on each site (compared to the average for 2007 so far).

Its not a huge decrease but its certainly welcome. If you can find two other similar improvements, you have 10% more visitors sticking around to visit your site for longer.

I'd like to express my point of view. Alledia.com used the standard module welcome message. I wrote the welcome message for demo purposes only. The message is fully customizable from the back-end. For example putting this code at the beginning of the welcome message:

<h3 style="text-transform: capitalize">%K</h3>

will have the result of setting the module title to the actual search string.

Also, consider using SE Keywords Module together with Keyword Density content search plugin. It will dramatically improve user experience.