I don't know about the US, but up here, Ive been seeing more and more HiHys and RX400hs lately. I saw a total of 10 today and yesterday. I normally see one every 2-4 weeks. They're quite expensive up here in Canada - $44k for base HiHy 4x4, $54k for Limited 4x4 version, $61k for "base" RX400h, nearly $70k for RX400h Ultra Premium. For comparison, the Prius starts at $31,5xx and the Camry Hybrid starts at $31,900. A loaded Highlander Limited V6 4x4 is $45k, a base RX350 is $51k.