If you discover any useful book recommendation sites please post here so we can update our list - thanks in advance. 
www.whichbook.net
www.storycode.co.uk
www.fantasticfiction.co.uk Invaluable site for looking up authors & their works/series, plus forthcoming releases
www.librarything.com
www.encompassculture.com
http://www.anobii.com/anobi/anobii_home.php Lets you build an online bookshelf and provides recommendations based on your tastes
http://www.whatshouldireadnext.com/ Book recommendation site
http://www.historicalnovelsociety.org/ All about historical fiction, including new releases
http://www.bookandreader.com/ Book chat and reviews
http://www.bookgrouponline.com/forum/index.html Online reading group with lots of reviews
http://www.bookswellread.com/home.php a combination of an online book journal/review site
http://www.bookbrowse.com/ Good review site
http://www.lovereading.co.uk/ Reviews and opening extracts
http://books.google.co.uk/
http://www.stopyourekillingme.com/ A great site for lovers of crime/mystery/thriller/suspense books
http://us.bookbutler.com/do/showWelcome Extremely useful book price comparison site (for when you absolutely have to have a book and just can't get it on RISI!)
Currently reading - Nobody, Nowhere - Donna Williams
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