I used sharedview now from the start and I must say it is great easy to handle. even for old people like granddad’s who are stuck with the computer but you don’t wanna go there to spend your sunday.
You can use shareview
After you signed in with your live account you can do a start new session
Press start and you are done.
now you started a session others can join easy by using the pasport nome
or do an invite 
you can share desktop 
now you can take control on the others desktop to help or just to show a powerpoint or tool demo, anything you want.
Cool stuff and easy to use check it out. It is still beta get it Download SharedView Today
Go here for the complete beta site :http://connect.microsoft.com/site94
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Author: Robert Smit [MVP]
Robert Smit is Senior Technical Evangelist and is a current Microsoft MVP in Clustering as of 2009.
Robert has over 20 years experience in IT with experience in the educational, health-care and finance industries.
Robert’s past IT experience in the trenches of IT gives him the knowledge and insight that allows him to communicate effectively with IT professionals
who are trying to address real concerns around business continuity, disaster recovery and regulatory compliance issues. Robert holds the following certifications:
MCT - Microsoft Certified Trainer, MCTS - Windows Server Virtualization, MCSE, MCSA and MCPS. He is an active participant in the Microsoft newsgroup community and is currently focused on Hyper-V, Failover Clustering, SQL Server, Azure and all things related to Cloud Computing and Infrastructure Optimalization.
Follow Robert on Twitter @ClusterMVP
Or follow his blog https://robertsmit.wordpress.com
Linkedin Profile Http://nl.linkedin.com/in/robertsmit
Robert is also capable of transferring his knowledge to others which is a rare feature in the field of IT. He makes a point of not only solving issues but also of giving on the job training of his colleagues.
A customer says " Robert has been a big influence on our technical staff and I have to come to know him as a brilliant specialist concerning Microsoft Products. He was Capable with his in-depth knowledge of Microsoft products to troubleshoot problems and develop our infrastructure to a higher level. I would certainly hire him again in the future. "
Details of the Recommendation: "I have been coordinating with Robert implementing a very complex system. Although he was primarily a Microsoft infrastructure specialist; he was able to understand and debug .Net based complext Windows applications and websites. His input to improve performance of applications proved very helpful for the success of our project
View all posts by Robert Smit [MVP]
Press start and you are done.
now you started a session others can join easy by using the pasport nome
or do an invite 
now you can take control on the others desktop to help or just to show a powerpoint or tool demo, anything you want.
Robert Smit MVP Blog 