Are there any recommended Basecamp plugins/stand alone apps for XCode/OSX to manage milestones & to-do's etc?
A:
I would assume not (but I could be wrong). As you probably already know, Basecamp does have an API that is easily accessible. Utilizing tools that allow you to connect with web services should do the trick. Here's the API documentation (http://developer.37signals.com/basecamp/)
Unfortunately, Basecamp has yet to create APIs that allow you to create projects, people, or companies. There have been complaints about that for a long time.
Prattski
2010-05-28 12:05:01