I\'m using Visual Studio Team Services (http://visualstudio.com/), with Visual Studio 2012.
I\'d like to add a new State Value for WorkItems. After a search I discover th
http://lajak.wordpress.com/2013/01/09/tfs-2012-versions-of-team-foundation-server/
Cons: •Can’t customize process template or workitem templates
So it is not possible to add new states on Team Foundation Services.
Nevertheless, "Team\Team Project Collection Settings\Process Template manager" just allows you to up- and download Process Templates, where you can edit the WIT XMLs. A more comfortable way is to use/install TFS PowerTools and use the WIT Editor "Tools -> Process Editor -> Work Item Types -> Open WIT from Server/File".