Hi,
Just did a little more testing, this time end to end with my Kindle 1 and Xoom.
The 36 character ASIN is not a problem and it showed up on a new book I had not run through this process so I don't expect these will be a problem either. Will re-convert everything and check a few on both devices later in the week/end.
Only issue I could see was a need to Sync to furthest page on the devices other than the one where I was originally reading the book. Also you have to Sync & Check for Items on the original device when you close the book or it seems the furthest page counter is not updated.
Not completely automatic but something I can live with now I understand a bit more about how it works. I was thinking if I opened a book on my Kindle and read a few pages then went back to Home it would automatically update the page-read counter in the cloud so when I opened the same book on my Xoom it would automatically open to the page where I left off reading on the Kindle.
So, the updated Python code for asin_search.py appears to be good. Sebastian gave me a few basic Python hints and suggested a free book on Python as a resource,
Dive Into Python by Mark Pilgrim.
Will edit my previous post(s) to remove my complaint about the odd formatting of the ASIN. It must be one of those esoteric things that Kovid keeps up with in order for Calibre to keep running so well.
Rob