Conventional presence (is Paul online? is Missy on the phone?) is useful. Extended presence (when is Peter free to talk? what does Devin’s OOF message say?) is even better. Microsoft has done a great job of delivering both of these capabilities in Outlook, Communicator, and the SharePoint twins. However, I want to kick it up a notch: I want to see Plazes-like
geo-presence information. Imagine being able to see a web part in your SharePoint team site that shows the (self-reported, opt-out) location of each of your team members. For my team, it’s small enough so that this would be more a curiosity than anything else, but for larger teams it would be terrific.
I already do something like this, updating my IM status message to say things like “DTW enroute SEA” or “Exch Conn – Orlando” so that people will know not only what I’m doing but where I am. It would be great to make this more automatic, though. You could probably do this easily enough by making Plazes queries for your team then plotting them on Virtual Earth or Google Maps.
Paul's Down-Home Page 
You are aware of the Skype integration we added with the latest release of the Plazer, right?
http://blog.plazes.com/?p=99
I’m not even signed up for Plazes yet, but now that I know there are Plazer versions for both Mac OS X and Windows I was planning on it before I head out to Nice.
I do agree and there is also some work in progress that will eventually do this in SIP. Most notably there’s the requirements for Geographic Loaction and Privacy (Geopriv) that has been published in RFC 3693 and an Internet Draft called “A presence-based GEOPRIV Location Object Format” combining these with some of the SIMPLE extensions like Spheres and Presence Authorizations (Controlling which groups/users may see which Presence data) would eventually not only show where you are, but also let you set rules on which kinds of presence information you want to show. Like if the time is past 10 PM and I’m working from home – then show my IM status, but don’t show my VoIP / Video presence to my work colleagues – but do show it all to a selected group of my friends. As OC is using SIP/SIMPLE it may eventually turn up in OC (Although they are right now working with a concept of somehow ACL’ing you’re presence status).
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