I have found a way to view nearly native clips from the EX1 on a PS3.
I say nearly native as the audio has to be rendered but not the video.
This is a PC based solution.
Use Clip Browser to bring clip into Vegas.
Download MXF Desktop, if you don't have it, from Snell & Wilcox.
It is free on request via a link at DVi XDCam EX CineAlta forum. (MXF Unwrapper)
This unwraps MXF files. It also enables MXF playback on WMP.
You will get an .m2v and 2x AES files. Rename the .m2v to .mpv.
Import the mxf into Vegas 8 Pro and render the audio to AC3.
Download and run TSMuxer. Select both the .mpv and .ac3 files.
Create a .ts transport stream.
This can be renamed .m2t to run from a disc or drive on the PS3 or rename to .mpg if using a network connection.
I have not tested it over the network yet so not sure if 35Mb will work Ok. This could also be used to make a non rendered Blue ray disc.
Unfortunately this is long winded and does not allow editing but if you want to see video on a TV screen untouched by rendering it is the only way I have found. I would be much happier if Vegas would smart render.