I have been trying to do this as well but have had no luck. My goal: Share a google task list. I thought that Astrid task lists would directly sync with google task lists (rather than staying separate as they currently are). Fixing this problem would fix my problem, because right now you can only share individual tasks from google task lists synced into astrid OR you can share a full astrid task list between users (but this cant then be synced to google). I don't see why they cant just combine them into one type of task list -> thereby fixing both of our problems.
Other programs tried (with no luck for sharing Google Task Lists)
- Gtasks - not possible
- Any.do - similar functionality to Astrid
- Taskos - similar functionality to Astrid
- Toodledo: Sharing costs $14.95/year
- Remember the Milk: Sharing costs $25/year
- Wunderlist - not possible yet (though supposedly coming & will be free)
If Astrid got this feature it would definitely set it apart from the market. Any help would be greatly appreciated. Thanks