[Lizard]

1) You can sort of accomplish this by creating a milestone for your deadline with a locked end date and making all the other tasks or task groups pre-requisites for that milestone.

2) Yup. That's a feature we'd like to add, maybe as soon as 2.0.

3) Yup. That's kind of the same feature as (2), actually, from a certain point of view. Again, maybe soon.