The comments on that blog post mention a couple of homebrew methods of getting software onto a Pre. The author of the blog also comments on them being a pain in the ass and that normal users won't use it.

With the iPhone's installed base you can get a decent number of people in the jailbreak community. When you're talking about a platform with an order of magnitude less customers and a homebrew process that is not anywhere near as unified or streamlined, you're looking at miniscule numbers.