Dopplr is one of my new favorite web applications. I use it to catalog all of my travel and post it online so that all of the others that I have invited to use Dopplr can see where I am and when. It makes a lot of sense for people in a similar field because I know who is going to what conference and meeting and can actively try to get face time with them. The BBC reported that at Le Web Dopplr announced that it was opening up to anyone who wants to register. Joi Ito Invited me to Dopplr originally and I continue to add friends I know in the technology and social space field. Privacy is truly gone for those of us who work in the social field so why not open up everything? Part of the comfort level with being open is that we respect each other's space and information.