[revelation]

Well in theory you can store data for anything in a DHT, not only an infohash. So you could have your program query the DHT for the key "MySoftware-Latest" and store under that key the infohash for the latest version.

I don't know how much flexibility there is in popular DHT implementations as to what you can store for a given key, and you will need a server of yours to continuously refresh the data and keep it alive in the DHT.