Once you've found your jar through mvnrepository.com, hover the "download (JAR)" link, and you'll see the link to the repository which contains your jar (you can probably Right clic and "Copy link URL" to get the URL, what ever your browser is).
Then, you have to add this repository to the repositories used by your project, in your pom.xml :
<project> ... <repositories> <repository> <id>my-alternate-repository</id> <url>http://myrepo.net/repo</url> </repository> </repositories> ... </project>
EDIT : now MVNrepository.com has evolved : You can find the link to the repository in the "Repositories" section :
~ Answered on 2011-07-08 14:35:01