After slipping past their original spring release date, Panasonic's PZ850 series of plasmas are no longer the only ones with YouTube support, but those desiring internet features, high contrast ratios and easy-access calibration settings can expect them on shelves this summer.
The 46-, 50- and 58-inch versions should all be available in mid-June, with the 65-incher rolling out in August. Other than the IP features (Picasa access is also part of the package) the THX-certified PZ850s support h.264 playback from the SD card slot, RS-232C, 24p native playback, and a variety of display modes and settings to get the picture just the way the director intended, the way you like it, or anywhere in between.

Source- http://www.engadget.com/2008/05/20/panasonic-vieracast-internet-enabled-plasmas-due-this-summer/