I recently changed the server that runs the various websites I host / maintain, moving from a Core2Duo 2x1.80Gh2 with 1Go RAM to a Celeron 2.0Ghz with only 256Mo.
The main reason I had such a server was hosting doap:store, as I wanted to run SPARQL queries in a reasonable time.
From the LOD mailing-list, I discovered and browsed doapspace.org, that aims to build a DOAP repository.
For those who want to play with DOAP files, doap:store now provides a dump of its content, containing all DOAP files fetched from PTSW.
I was writing an opensearch plug-in for doapstore.org to allow searching projects directly from Firefox or IE7 search box, when I remembered yubnub.org, which already have such a plug-in. YubNub allows anyone to create command lines for the web, eg. typing "gim rdf" will search Google images for "rdf".
doap:store now provides a SPARQL endpoint for its data. The RDF store used is threestore, so it supports GRAPH queries, but you may have to use the http://triplestore.aktors.org/direct/# namespace for some properties (as direct:type instead of rdf:type in GRAPH queries).
I've just completed a first release of doap:store, a user-driven directory of DOAP projects.
I've just pointed that I used DOAP to represent various information about SIOC Exporter for Dotclear.