The new version adds support for Folders and Document Sets. If a user selects a folder or document set to run the workflow on this activity will get all items from the folder / document set and add them as attachments to the email.
Download the .wsp file and use the normal methods for adding the solution to SharePoint. This activity has only been tested on a stand alone install of SharePoint Server 2010 running on Window 7 OS.
In the Downloads above there is a new item marked with Issue Tracking. This is an update to version 2 that adds support for working with Issue Tracking lists.