Actually, the Panasonic 22LH1 (22" widescreen) and the 32LH1 (32" widescreen)have DVI in.
The lower models like the 20LA1 (20" 4:3), 17LA1 (17" 4:3), or the 15LT1 (15" widescreen) only composite, s-video and component inputs.
None of the Panny models mention about being both computer and TV monitors. They only mention being TVs.
I'm personally curious about the Zenith TVs. The 15" 4:3 model (L15V36) is 1024x768 with a 176° viewing angle, 400:1 contrast, 450 cm brightness. Actually it has basically the same specs as their 22" model (besides screen size/ratio). It'd make a decent PC monitor with multimedia advantages.
Unfortunately, their 20" model is only 640x480 res.