Excellent blog post from someone who sounds like Pob but is actually Pogo69, he may have an unusual name but his blog is excellent.
he has published some Visual Studio templates for CRM 2011 and you can read about it here
Here are the links and installations instructions from his blog
Custom Workflow Activity
How to Install
Simply copy the zip files (do not extract them – just copy the archives directly) into the folder:
<My Documents>\Visual Studio 2010\Templates\ProjectTemplates\Visual C#\CRM 2011\
I called my new folder ‘CRM 2011′ – you can call it what you wish. The name you choose will appear as a new category when you create a new Visual Studio project: