No links to give you presently, but there are a number of display options for 4:3 material being presented on the Tosh, including the typical "stretch" feature.
Then I'd give a serious looksee at the Toshiba 57HX81. HTF co-owner Ron Esptein has one of these, which has been calibrated by Gregg Loewen.
Now, what questions, specifically, do you have regarding HD-capable widescreen displays?