The LEGO Superheroes sets are now available for sale at Amazon. Note that LEGOShop has most of these sets on backorder while Toys R Us has them all out of stock despite being significantly marked up (Batcave is $89.99 vs $69.99 MSRP while Catwoman Catcycle Chase is $19.99 vs $12.99 MSRP!).
Amazon is the clear winner right now with the sets instock at MSRP, free shipping on orders above $25, and no tax to most states.
*In addition to LEGO Superheroes, Amazon is also now carrying the new LEGO Dino sets.