Confirmed by Apple to be in Q4 of 2007. More details to be released at the end of Q3.
http://news.yahoo.com/s/pcworld/20070726/tc_pcworld/135106;_ylt=Ap968fPUYGDPBiA6.Q1mgpojtBAF
http://news.yahoo.com/s/pcworld/20070726/tc_pcworld/135106;_ylt=Ap968fPUYGDPBiA6.Q1mgpojtBAF