Last year Visual Studio Team Services (formerly known as Visual Studio Online) released support for extensions. There are some great samples on GitHub and a growing number of finished extensions in the marketplace. One of my published extensions is Estimate, a planning poker implementation for VSTS.
Quick update: a few weeks ago I left Germany and Microsoft Consulting Services and moved to the US. I’m now a developer on the Visual Studio Online team in Redmond, WA.
If you stumble across the following error message with Visual Studio 2013 Update 2 RC:
Recently my Windows Search started to misbehave. It consumed large amounts of memory and CPU time. In addition, the index (in C:\ProgramData\Microsoft\Search\Data) grew to several gigabytes.
Recently I’ve had a problem where a deployed WebApi service did not accept the DELETE verb (locally, using IISExpress it worked). The solution was to remove the WebDAV module and handler for the specific site. So extend the web.config of the WebApi project with: