My guess is that the single processor G5 had a similar price point to the iMac, which has similar specs, plus a built in LCD. MacMall lists the 1.8 Ghz power mac at $1495 and for the same price they offer a 2 Ghz iMac. My feeling is that they want to keep the lines between the iMac and the Power Mac pretty clear to eliminate customer confusion. Plus, dual processor Power Macs have been available for about 4 years and there have been several times that they've only been available in dual processor configurations. I wouldn't read much into it and I think its too early to start thinking about clearing inventory of Power PC chips. Remember that the high end chips are rumored to be transititioned in late 06.