quicko: addicting

So the other night at my writers' group we spent entirely longer than most groups of people (aside from perhaps my co-workers, who all happen to be English teachers) discussing whether or not "addicting" was a word.  Evidently both us of Americans in the group had used the word entirely independently of each other with the space of an hour (I missed the first mention, but brought about the second), and the Australians were convinced it wasn't a word and that the appropriate adjective was "addictive."  After the necessary googling (now there's a non-word for you), we determined that it's probably not actually in the OED, but that even highly literate North Americans use it without any linguistic qualms.  Or at least they didn't use to ...