co-worker mailed himself a pages document from his mac .. wich he could (of course) not open on his MS Office at work
I found out that the pages document is actually a Zip format.. so
unzip document.pages(this should also work with winzip or winrar http://www.win-rar.com/ )
it unpacked a number of files one of witch was a "preview.pdf"
note that anny images seem to be saved as seperate PDF's
if you need to edit the text you can copy paste it to your favorite editor from here ..