* COMCAST to expand on-demand video to 6000 titles.
* CISCO announces "entertainment operating system."
* ECHOSTAR unveils fully-subsidized converter box.
* PANASONIC shows off world's largest HDTV.
* PARAMOUNT may abandon HD DVD.
* SONY BMG reveals details of DRM-free music plan.
* BITTORRENT signs up Netgear and D-link as Device Partners.
