Alliance Collaborator (Score 1)

try Alliance Collaborator: http://www.thoughtrealm.com/ While it is a hosted solution it does not use a browser or any web stack so does not have any of those security issues. There is a small 4meg download to install the secure client (windows only for now). You can have multiple projects, tasks, discussions etc. open at the same time and it even allows you to track time at a task level. Free to try.