My, this is an old thread that's been brought back up. Whatever became of this? It would be nice to have this Seleniture "open sourced" as a project for others to use and/or expand upon.
But now that Selenium IDE is being replaced with Selenium Builder, it would be nice to integrate this with the new tool as well.
And on another side note, having this for Selenium IDE is a bit limiting. It would be interesting if this API can be exposed as Firefox browser extension (separate from Selenium IDE) that can be utilized programmatically with Selenium RC or WebDriver code-based tests. And if that be possible, extend that further for Chrome extension as I recall there are Omniture extensions for Chrome too like Omnibug.