If you configure Active Directory Federated Services (ADFS) you can use corporate identities with existing VSO accounts. Link to your internal domain and you can get a completely seamless Single-Sign-on from your local network to the cloud for Office 365, SharePoint Online, and now Visual Studio Online (VSO).
I have been working with a customer in London this week that is using TFS 2010 for work item tracking and Perforce for source control. Here is how I got on migrating source from Perforce to Git on VSO.
Did you know that you can have multiple email alias associated with an existing Microsoft ID (formally Live ID). The first thing that you should do if you receive a new email address, wither corporate or personal, is associate it with your current Microsoft ID.
I will be installing Visual Studio 2013 on Server 2012 side-by-side with Visual Studio 2012 on my development rig.