Publisher's Weekly and XML
Quick scan of Google News finds this on XML from Frankfurt. More on ePUB later. The thing is, JDF is XML as well and PDFXML is possible. So my point is that the print world need to be on XML speed to keep up. The Total Print show did have the technology available but I'm not sure of the timescale people are thinking about.
I'm near Tottenham Court Road at the moment. Both Waterstones and Sony Centre are sold out of the Sony Reader.