Harry:
There are currently no such consortium. Neither is there a World Percentage Book Referencing Consortium. At least, not that I am aware of (except
IDPF of course)
Jon:
I am not familiar with the page numbering features of the Sony Reader. How does it work? If they solve both my point 1 & 2 they should be implemented in all formats and readers. If not we need something better. My point is that page numbering should be consistent on different readers and formats and that this is not archived by referring to the number of pages actually displayed on one particular device using one particular font size. This is of course not the single most important feature for e-reading.