Gennady, are you trying to say that Google doensn't know the best marketing techniques? P.S: Google has chosen for their DNS-service an easy to remember 8.8.8.8 address ;-)
Remembering domain names and IP addressess are absolutely different things. Domain names are on the user level, IP addressess are not. Let's not make such "dirty hacks" to multi-level networking model :) (I avoid "7-level OSI model" phrase here). So, it's bad idea to build PR/marketing campaign based on "beautifull" IP-address. It's something like beautifull (from user, not engineer view) design of motherboards, gearboxes, etc.. It may be fine, but not more, there is a lot of more important things user should consider about. I completely can't understand, why you so need "easy-to-remember" addressess and don't you have a better way to make your services more user-friendly and PRable.