Check out the new twitter-like task delegation and tagging. To delegate a task to John type @John, to tag it Dev type #Dev. Quite simple! What you type in will automatically turn into a tag. Yes, it can be any word that starts with @ or #.
As you might have guessed, the point of tagging is to be able to filter your task list by tag. You might want to see only the tasks assigned to @John, or only the ones tagged #Marketing, or maybe only the #Marketing tasks assigned to @John. Clicking on the tag links will do the filtering.
The list of tags your tasks are filtered on will appear under the toolbar. Clicking on those tags will remove the filter.
This feature is available for Infinity users only.