RFC - rdf in rdms / status?

re: http://www-db.stanford.edu/~melnik/rdf/db.html

actvity on your site indicates that work stopped in 2001 .... is the 
project deas? (why is it the most useful things are always orphaned 
after you find them on the web?!)

please advise to its status -- and if dead, what direction your research 
has taken since ... still rdf/db?

thanx: david faibish