Apple Insider reports Apple has begun shipping Dual Xserves G5 to Virgina Tech. They also say Apple retail stores have received a large re-stock of current PMs and iMacs. If AI is correct, we definitely won't see neither new PMs nor new iMacs before WWDC. But of course the question remains what's going to happen to PBs, iBooks and eMacs. While the fact that they didn't receive laptop re-stocks hints to an imminent PB update (which would be followed by an iBook update a few weeks later), the fate of the eMac remains unclear.
http://www.appleinsider.com/article.php?id=416
http://www.appleinsider.com/article.php?id=416