Thanks for the links. We recently downloaded TaskFreak and are reskinning it to suit our needs.
We've added the Attachments plug in and are trying to figure out the email plugin. It isn't pretty but it allows us to set up users and assign tasks to users and have permissions established. But most of all it's running on our dedicated machine.
I'll ping back once we've fully deployed it to let you know how it went.
-policarpo | GTD2CYA