Good call, I always think the 240 is ITX.
The Air 240 is alot smaller than the Air 540, but i was hopping to find a micro-ATX case in something around the size of the Node 304. The Silverstone Sugo SG10 is only a little bigger than the Node 304 and allows micro-ATX but is just dam ugly. Since my i game at 1080p, i probably don't need SLI and mini-ITX should suffice.