This has two tools to make it easier to work with publishing App-v virtual apps to the Citrix Management Console.

The first tool in the package allows you to right click on any application shortcut, including those of App-V virtual applications to publish to XenApp. The wizard prompts you to select the servers from the list of servers in the farm, and Active Directory Users/Groups to publish to.

The second tool in the package allows selection of multiple App-V apps by selecting those found in the App-V cache for publishing to XenApp. The wizard interrogates the App-V client for the application list to choose from, prompts you to select the servers from the list of servers in the farm, and Active Directory Users/Groups to publish to. 

Although I wrote this app, it is published through the Citrix CDN site. At the Citrix CDN page you will find a link for the binary msi distribution or source code.

Update:  10/2013 Citrix has reorganized their site.  This version appears to no longer be available for download.

Also see these updated versions:
    XenApp Publishing Extensions 3.0 for XenApp 5.5 and above
    PublishFromAppV for XenApp 6.5