We've made a small, but important change to the front page of http://repository.sonatype.org. (You might recognize the design.)
Searching the Central Maven Repository Just Got Easier from Sonatype on Vimeo.
To search for an library or an artifact:
Once you have located the artifact you were looking for, click on the artifact and copy the dependency XML from Nexus to your POM. It couldn't get any easier or intuitive. Make sure to bookmark http://repository.sonatype.org.