I just saw this on Twitter while doing a search for Croogo related news. It looks like Matt Curry has released a plugin that will migrate your Wordpress blog over to Croogo. I would give this a shot but I'm currently not running any Wordpress sites. This is great news for any CakePHP developer running a Wordpress blog looking to switch over to the CakePHP based Croogo.
Right now it looks like it migrates most data, but I would test it on a development server before you migrate your production blog.
Check out the plugin on Matt Curry's Github repo
