This article caught my eye on r/programming I've started looking into RDF data stores because my current project involves talking to one. No Sparql in my resume yet but I'd like to set up a node to play with. This looks like a pretty nifty graph data store and it looks like it supports sparql and has python bindings. Huzzah
http://blog.neo4j.org/2009/09/social-networks-in-database-using-graph.html