Hi Terence: I've just begun an experiment with similar themes - the pros/cons of greater transparency, plus practical considerations on how public servants can do it. I just published a dataset of my 'hours worked' - that's more about giving people a retrospective sense of how I work, rather than enabling them to interact with me - but I will definitely be looking to see if I can share forward free/busy calendar info - noting there may be some insurmountable technical challenges at my end! I like your list of reasons not to publish more info, and hope to follow up on this with you if you're happy...?