ToysRUs.com is having a Buy One Get One 50% off sale on all Star Wars items, including LEGO. Browsing their LEGO Star Wars section, I see a few of the more expensive sets as being in stock and available, such as the Tantive IV, Endor set, Venator, and Home One. Also, there is free shipping on orders over $100. Sale is good through 5/1/2010.
Thanks to Mark for the heads up.