Just wanted to share a great tool I use: Todoist (http://todoist.com). Great tool to manage your tasks in projects. I like the interaction a lot. Everything is AJAX, but you can do a lot on the task description input, such as “@hobby Find a new hobby !p1” to add a task “Find a new hobby” with priority 1 and tag “hobby”. Great for my tasks and follow-up lists. Recently they released a version that you can use offline as well. Really great when you are on a plane.
The only disadvantage is that they have limited the amount of projects to 80. Not great when you want to carefully keep track of a lot of things. If you agree, vote here: