To vote just tweet a message of one of the forms shown below
#uksprouts First half of postcode whether you love or hate sprouts
So for example if you live in postcode area 51 and love sprouts you would tweet
#uksprouts G51 I love sprouts(The original fussy (not fuzzy) format was @jontrinder #uksprouts G51 I love sprouts)
(and that is still supported)
Map is updated every two minutes and theres a recipe at the bottom of the page as well!