New workflow: Open RAW images in Silkypix - no SPX edits; do batch conversion to 16 bit uncompressed TIFFs in SPX; open in Lightzone and do edits; save as JPEGs to fit within 1024 on the long side; discard the TIFFs, save the RAWs. This is a really effective workaround because of what I discovered and posted on the Lightzone Forum...
..." From my experience as mentioned in my original thread, Lightzone apparently does not read the corrections, embedded in the RAW file, for micro 4/3 lens geometric aberrations.
I thought this might be of interest to those of you who kindly responded to this thread a few weeks ago.
I found it while reading the G2 review on DPReview ....

..." A fundamental component of the Micro Four Thirds system design is the use of software to correct certain lens aberrations, most notably geometric distortion. For most users this is completely transparent - the camera corrects both the viewfinder image 'on the fly' and the JPEG files it records. Also, the relevant correction parameters are encoded directly in the raw file, which means that both the software supplied with the camera and industry-standard alternatives (including Adobe Camera Raw and Capture One) will convert raw files correctly. However users who like to experiment with more obscure raw developers which are unable to apply the requisite corrections will find themselves with highly distorted images, especially when shooting at wideangle " (quoted directly from the DPReview site ).

My workaround is to use the software that came with the camera, Silkypix, which does read the embedded RAW file geometric aberration corrections, to convert the image to a 16 bit uncompressed TIFF and to open that TIFF file in LZN. The hitch comes when discarding the huge 68 MB TIFF, ( who wants to clog their hard drives with a bunch of those !! ), which is the source file if one ever wants to go back and use LZN to re-edit...one can't. BUT, the source file can be recreated, by simply once again converting the RAW to a TIFF in Silkypix as in the original step. The LZN file will automatically re-attach and once again the original LZN edits will show!! Rather a nice save, eh what?
So, bottom line is, this works. Just save the original RAWs and it's ok to discard the TIFFs.
This gallery is my first attempt at the new workflow. Easy and effective from what I can see so far. I hope this helps others who may be struggling to get that perfect image!!
Good luck...
NOW A MUCH SIMPLER APPROACH WHICH I'M NOW, AS OF SEPTEMBER 2011, USING EXCLUSIVELY FOR ALL MY EDITS. JUST USE ACDSEE PRO6 WHICH HAS ADJUSTMENTS FOR GEOMETRIC ABERRATIONS. I AM VERY HAPPY WITH THIS PROGRAM AND USE IT IN CONJUNCTION WITH VIVEZA 2. NOT USING LIGHTZONE ANY MORE; IT WAS GREAT WHILE IT LASTED, BUT ALAS, IT'S GONE.