The Toronto Public Library has its neighbourhood book lists. Here, it also lets you go to specific neighbourhoods and see the list for that area. They even offer a process for readers to contact the library to suggest additional titles to add to the map.
Map of Book Lists by Neighbourhood
They also recently launched their Toronto Poetry Map created with the city's 4th poet laureate George Elliott Clarke, They also include a way to suggest other poems to include.
In the UK, lovereading.co.uk recently created a world-wide book map mashup, featuring titles from all over. Their list is sparse as yet (only 4 titles in Canada, 2 in Australia, and 2 in South America), and not always quite correctly placed geographically, but it is a start and will hopefully grow. Better access to the zoom feature would also be helpful. They do offer a handy "Submit New Book" button.
Brick Books does a worldwide poetry map that includes interesting symbols.
I'm sure there are others out there, and we'd love to hear about them.