http://www.franz.com/resources/educational_resources/white_papers/AllegroCac... is a rather interesting piece about RDF scalability. They claim to load 300,000 triples/sec from a triple store based on Allegro Common Lisp.
Allegro CL is also at the heart of Ora Lassila's Wilbur toolkit. OINK, a way cool new Wilbur application is described at http://www.lassila.org/blog/archive/2006/03/oink.html. [Does Wilbur run on the free version of Allegro?]. Wilbur loads 2600 triples/sec. Lassila is generally regarded with Hendler and Berner's-Lee as one of the founders of the Semantic Web.
[Bill Campbell, a colleague of mine and author of UMB-Scheme distributed with RedHat Linux, once remarked "XML is just Lisp with pointy brackets". The above might support: "RDF is just CLOS with pointy brackets". Which, by the way, is positive.]
Does anyone know what triple retrieval claims Oracle is making for its triple store support?
There is a good current survey of RDF programming support at http://www.wiwiss.fu-berlin.de/suhl/bizer/toolkits/
--Bob