Let me start this off by saying that I love Basecamp and use it everyday...but I am very intrigued by Duet. The app looks really great and I am a fan of the way the UI and navigation are set up.
What I think you are missing however are Discussions. I find discussions to be the single most valuable feature that Basecamp has to offer. I also love that for any todo or file, project members have the ability to comment on that item, which is essentially a discussion in itself.
The ability to keep all of the conversations that are taking place with various members of both my internal and external teams in one place is incredibly helpful. It eliminates the need to track disperate conversations across gchat, gmail, skype etc, and gives all team members transparency into the various facets of the project.
I think adding these features would make your app much more robust and compelling.
What I think you are missing however are Discussions. I find discussions to be the single most valuable feature that Basecamp has to offer. I also love that for any todo or file, project members have the ability to comment on that item, which is essentially a discussion in itself.
The ability to keep all of the conversations that are taking place with various members of both my internal and external teams in one place is incredibly helpful. It eliminates the need to track disperate conversations across gchat, gmail, skype etc, and gives all team members transparency into the various facets of the project.
I think adding these features would make your app much more robust and compelling.