Maybe some of you have started to use Microsoft Office Developer Tools for Visual Studio 2012 - Preview 2 in order to develop for SharePoint 2013.
We would like to let you know that ,so far, the component is not supported (delivered "AS IS"). So if you have any issue you need to wait until the RTM release in order to open a case.
Please, check the license of this component that is attached to this post and you should check points 10, 14 and 15 for more detailed info.
Otherwise, you can post an entry in the following fórum for questions regarding this component.
Héctor Calvarro Martín. SharePoint Dev/Core. Microsoft Support Escalation Engineer for EMEA