My current employer, Leeds University Library, is running an event called “Leeds Read at the moment, to culminate with World Book Day on Thursday 2nd March 2006.
Around the various buildings, there are displays and opportunities for people to vote for their favourite book, and there are special “meet the author” type events too. The staff room in my library has a bookswap event going on too, in a take-a-book-leave-a-book way.