Just rolls off the tongue, doesn't it?
doapurl.org is a canonical DOAP permanent URL resolver. All of the server code is released under the terms of the GNU GPL License and all of the data produced by doapurl.org is released under a Creative Commons license.
Functionally, doapurl.org works exactly like a PURL resolver. That is, it simply performs HTTP redirects. How the PURLs are created and the way the PURLs are categorized is where doapurl.org differs from traditional PURL resolvers.
We have a one-level structure of categories which makes remembering and searching for DOAP easy. Unlike an actual PURL resolver, only members of an Open Source project may create and edit a PURL on doapurl.org. Using OpenId delegation from a known URL namespace members of a particular project can write to, we can determine that a DOAP record is owned by that project.
The goal of doaprul.org is not to create one more massive software package index, but to create an index of authoritative DOAP URLs. Using this index of URLs will allow others to create searchable package indexes or find metadata for Open Source projects quickly and easily by using a unique name or category and name pair.
Having a permanent URL for your DOAP will also make it easier for existing package indexes and release notification systems such as SourceForge and Freshmeat to take full advantage of the benefits of DOAP and its distributed nature.