I had a browse round the other night and found out a couple more links. Although they expalain a bit more about the junction upgade, I haven't found out much about the station itself. At least they dont seem to be proposing to flatten it and rebuild it "Euston style"
(The Network-rail schematics on the Railfreight site are badly in need of a tidy-up..........)
http://www.reading-travelinfo.co.uk/...F5AF3&pCAT=123
http://www.rfg.org.uk/library/?pid=3....htm&ped=24763