I did keep the ST-E3-RT order through B&H. Nobody has one, but B&H has it for $319 (IIRC) while Amazon has it for $470 for some reason. I'm really looking forward to flash without having to have a big heavy unit on to of the camera. I'll just keep it there all the time (assuming I can find a bag to accommodate it).
Meanwhile the three units I've got so far are a treat. Simple, integrated, really well done execution. Not to mention the extra goodies like the gel holder. I've held off buying a gel solution as they were all hodge podge involving tape, or at best, velcro.