z4, according to otcbb.com we have the "E"... Scroll down to our symbol: <a href="http://www.otcbb.com/asp/dailylist_detail.asp?mkt_ctg=OTCBB&d=09/16/2009" rel="nofollow" target="_blank">http://www.otcbb.com/asp/dailylist_detail.asp?mkt_ctg=OTCBB&d=09/16/2009</a>