Live Services, SOAP, REST ?????

As i mentioned in my previous post i attended a in person session on Live Services in Redmond on 15th November.

Here are my notes/ observations about the session

We discussed about what all services are available which is already well documented on dev.live.com
I would be more interested in finding why some services are REST services and some are SOAP based. Does it have something to do with live authentication or it is only because of the fact that REST is a simple light weight protocol.
I have a feeling that it might be because of the authentication. As i understood it all the services which need the user to be signed with live Ids are using REST APIs eg. live contacts while the services which can work without a live id authentication are using SOAP eg. live search.

Now how much of it is true remains to be determined. I would probably work towards finding this out and post my findings in a different post here.

BTW at the end of the event a free XBox was given by a lottery and it was won by the person who picked the lottery from the bowl. (Do i smell something fishy here :) )

~Abhishek