The Linnean Society of London (where Darwin and Wallace's seminal paper which first proposed the theory of evolution by natural selection was famously read in 1858) have announced that they plan to publish the Wallace notebooks they own online as a contribution to the 2013 anniversary celebrations. The Society has 10 of Wallace's important early notebooks, including four volumes of the journal Wallace kept whilst travelling in the Malay Archipelago, which he used to write his famous travel book The Malay Archipelago. They were donated to the Society by Wallace's son William after his father's death in 1913 and have only been read by a few scholars since.
Two of these notebooks, the 'Species Notebook' and the 'North American Journal' will also be published as printed books in 2013. The first is being transcribed and analysed in minute detail by evolutionary biologist James Costa, and the second is being transcribed and edited by Wallace historian Charles Smith. For more information about the Linnean's project see: http://www.linnean.org/The-Society/societynews/Wallace_2013
It is also worth noting that William donated his father's two other early notebooks to the Natural History Museum library (which also has a number of later notebooks). These are Wallace's collecting notebooks, in which he listed the insect and bird species he collected in South-East Asia, along with notes on their behaviour etc. The Wallace Correspondence Project, which I am the Director of, has scanned these and aims to publish them soon as part of its online catalogue of Wallace's correspondence. This online catalogue will be 'soft launched' on the Museum's website next month. Watch this space!!