In creating CFSelenium, Bob made it possible (easy, in fact) to create and run Selenium Server scripts using ColdFusion 9, and created a plugin for Selenium IDE that would output the recording statements in CFSelenium format within MXUnit test case functions.
Bob wrote CFSelenium in ColdFusion 9-compatible cfscript, and after he announced the project a few folks inquired about the possibility of having a version written in tag-based CFML. On somewhat of a whim, I decided to take on that task, and ended up with a tag-based version of Bob's original selenium.cfc file that is compatible with both ColdFusion 7 and ColdFusion 8, as well as a few test files that run against the tag-based version.
Bob has now incorporated my tag-based version and my test files into the CFSelenium project, and we've agreed that I will maintain the tag-based version while he maintains the CF9 script verison. You can download CFSelenium from either RIAForge (http://cfselenium.riaforge.org/) or from GitHub (https://github.com/bobsilverberg/CFSelenium). For more about Selenium in general, I'd suggest reading Bob's blog post announcing CFSelenium as well as the Selenium website.
So if you're a developer whose responsibilities include cross-browser testing of your web pages, you should really check out CFSelenium.