I’ve just uploaded a new version of NoteScraper for Evernote (download) that supports exporting all of your Kindle notes and highlights from a particular book to a single Evernote note. You can still export each of your annotations to separate notes too, but I had a request for the all-in-one feature. (Thanks Will.)
The new version also includes the authors name in the title of the notes.
Visit my software page for a bit more info, or just give it a spin.