Sony has officially commented on earlier rumors (that we did our best to debunk earlier) regarding the lack of upgradability in the "core" $500 version of the system. The rumor stated that the lower model would be unable to use wireless controllers (suggesting the console would ship with wired controllers) and that the 20GB hard drive would be unable to be upgraded.
A Sony spokesperson told GamesIndustry.biz, "Both configurations will support Bluetooth PS3 controllers." As for the second rumor, Phil Harrison told GI.biz earlier, "You can put in any drive that you like - it is a computer, after all."
What about the other disparities between the two systems? Sony says both a Wi-Fi adapter and a card reader will be available for the system leaving HDMI output as the "only non-upgradeable feature of the 20GB configuration."