So I ended up getting a MetaWatch. There is some limited support for TouchDown now with the newest version of TD and MetaWatch software.
There is an un-read count widget for MetaWatch for TD. But it only updates when new email is received.
Notifications are also sent to MetaWatch when new email is received by TD. However, if there are two or more unread emails the notification only gives count of unread, not author/subject.
As I said, limited support, but hopefully more is coming...