Are there any import scripts available for Alfresco? For example, if I have knowledgetree 3.7 and would like to migrate all the data to alfresco, would there be an automated way for doing that?
You can import stuff into Alfresco in many ways. You could for example use ftp, cifs, or webdav to just move document structures into the repository. Another great way is to use the Bulk importer http://wiki.alfresco.com/wiki/Bulk_Importer.