bradfitz has already replied, I just wanted to add what seems to me to be the focus of both projects, because they are different: Camlistore aims to be your re

bradfitz has already replied, I just wanted to add what seems to me to be the focus of both projects, because they are different: Camlistore aims to be your repo of all your stuff that you may want to share with other people at a later time. It wants to be the repository of all your life and everything that happens. Upspin aims to be a unified protocol for all applications to access (and possibly modify) data, wherever it is: maybe it is your website on your server, maybe it's a NASA dataset on some S3 tenant, maybe it's an imgur gallery, maybe it's an OpenStreetMap dump of their DB; the goal AFAICS is to give any application access to data regardless of where and how it is stored, so that applications can do what they're best at.