Hmm. I the EX1 sensor looks pretty small...

So... how about adding 1/3" sensor sizes, you know like in the vast majority of prosumer camcorders? Heck you may even want to add the 1/4" used in a lot of consumer camcorders too. I know... give an inch and they want a mile.

My old canon is a 1/6" !

I'd be more tempted to go off a sensor size calculated off the user manual than off the PanavisionNZ site. I've tried to use their 1/3" sizes in Maya before when matchmoving Sony Z1 footage and things never seemed to line up. Basing it off the user manual (4.98mm*2.80mm) got things lined up better.

The DVX sensor size is 4.8 mm x 3.6 mm.

This kind of info is vital if you work in VFX and (especially) with 3D.

Trying to find the true size of someone else's digital camera's "film back" is amazingly difficult.

Unless I've just be asking the wrong people? Or the wrong way?

Considering the new Ikonoskop A-cam dII camera is using a "Super 16mm sized" sensor, it would be great to have that size on the chart too.
Super 16 film actually has a number of apertures at the film plane:
http://en.wikipedia.org/wiki/16_mm_film