It might be interesting as an open source project, but I can't see it as having too much value, especially with hosting services like Dreamhost giving people 1 click installs of Wordpress.
Honestly I'd be worried if I saw somebody using a tool like this to install WordPress. Too much potential for abuse.
It's not that I don't trust you, but I don't trust the other nefarious guy who will build SEO and setup a site to install corrupted versions of WordPress for people.