iTunes PreInstalled HPs - End of March
According to the meta-description embedded in the HP Music Site, HP should start shipping iTunes pre-installed HPs by the end of this month:
The [iTunes] icon will start shipping pre-loaded on Pavilion and Presario computers in late March and these pages will be the first landing site directed towards HP.com/music
The original announcement placed pre-installed iTunes shipments in "summer". No further word on availability of the HP-branded iPod, however.