Graphhopper 0.1.1 is now available on maven central. Which means that you can include it as a dependency in your pom.xml without adding a repository. See the snippet on the website.
Also there are some minor bug fixes and better support for internationalization. E.g. GraphHopper Maps should now be able to detect your locale and apply the translation (de, en and es) automagically. Or you can force it with the locale parameter: http://graphhopper.com/maps/?point=berlin&point=madrid&locale=de_DE
PS: If you are in the USA (or use en_US) you'll see feet and miles, which I highly dislike but people are used to it.