Will add sites to this list as I find more appropriate ones. They're not in any particular order - you'd expect that from me.
http://www.europe-camping-guide.com/ self explanatory really
http://www.horizonsunlimited.com/hubb/ for those intent on a world trip of just parts of it. very good info resource
http://www.alpineroads.com/index.php the best Alpine passes in Europe for the fang merchamts
http://www.alpentourer.com/ similar but for those who like scenery
http://www.nurburgring.org.uk/ The Bloody Nurburgring on your own bike
http://www.ducati.com/heritage/museo/introduzione.jhtml Ducati Museum
http://www.directferries.co.uk/ most of the European/UK ferries
http://www.ace-cafe-london.com/dis.htm Ace Cafe in London
http://www.smoothhound.co.uk/ V Good site for B&Bs & small hotels in the UK
http://www.pubs.com/ UK Pubs for the beer lovers
http://www.nationalmotorcyclemuseum.co.uk/ A Must - near Birmingham - on way back from the IoM TT.
http://www.beaulieu.co.uk/motormuseum/events.cfm Beaulieu Museum near New Forest in England's South and near Sammy Miller's museum - will find that site.
http://www.townandcountry.ie/ B&Bs in Ireland Very good site
http://www.goodwood.co.uk/fos/ Goodwood Festival of Speed
http://www.grandprixcities.com/events1.html MotoGP & World Superbike tickets & accommodation etc
http://www.gpticketshop.com/index.php?l=en&c=motogp MotoGP & World Superbike Tickets
http://www.bestbikingroads.com/ UK Biking roads
http://www.motorvision.nl/travelinformation.html
http://www.worldsbk.com/home.php World Superbikes site
http://www.fim.ch/en/default.asp?item=11 MotoGP site