Just a wee word of caution, though.
Dan Gosling started the website when he took on his plot about a year ago (?), but now has another interest, if you look at his home page
http://www.gozplot.co.uk/.
As far as I know, he's not added anything new to his allotment stuff in six months, and there's a fair bit "under construction".
Some other sites which are regularly updated
Salsify and Scorzonera (I declare an interest - it's mine!) - http://www.keirg.freeserve.co.uk/diary/
Paul's Garden World - loads of information -
http://www.powen.freeserve.co.uk/For anybody who wants to follow up on a library of links, have a look at the News/Internet Links thread
All best - Gavin