We have one project called Kanban board, with all the features for web, iPhone and Android app (8 people use it). This board has several headers:
* To Production -> All tasks that are ready to be deployed
* To Test - Second test (5) -> All tasks that have to be tested a second time
* To Test - First test (15) -> All tasks that need to be tested
* Development - Finished (10) -> All tasks that have been comitted, but haven't been deployed to the alpha sever/app.
* Development - Working (7) -> All tasks that developers/designers are working on.
* Pending - Bugs -> All tasks that need to be fixed.
* Pending - Analysis -> All tasks that need to be analyzed (improve description, break them into subtasks)
* Pending - New (20) -> All tasks that need to be done
* Backlog -> All future tasks / features / suggestions
We use projects to indicate if the task is for web, iPhone or Android; and tags if it's urgent.
There can not be more tasks that the number between parenthesis. If there are 12 in Finished for example, we know we have to deploy to the alpha server/app.