Haruhi Suzumiya recenty reached a milestone. Since the release of the 2006 anime, we've seen 25 different CD's, ranging from Drama to soundtracks, to variants on variants of the cds. Now counting the Wednesday release of "Super Driver," over 1 million CDs have been sold.
Though, the 25 CD number is a bit skewed, since it doesn't include the English Drama CD's that Bandai packaged with its US release. I'd decry series abuse, but I'll buy just 10x soundtracks for shows like Utena and Escaflowne, so I can't judge.
Link to "Super Driver" for anyone interested.