According to the Superman Homepage, Warner has released it's 2006 schedule for DVD releases. Season 4 of L&C is set to be released sometime between October and December!
party Here's the link: http://www.supermanhomepage.com/news.php

Wash: Everything looks good from here...Yes. Yes, this is a fertile land, and we will thrive. We will rule over all this land, and we will call it... "This Land." I think we should call it "your grave!" Ah, curse your sudden but inevitable betrayal! Ha ha HA! Mine is an evil laugh! Now die!