In the comments of the blog about the new data package Ed Spencer mentioned that it is or will be possible to bind form data to a model (s. below).
I can´t find more details in the API docs. Is this feature already available?
2) Indeed - I prefer to do everything through the Model and just use the form for dumb data collection
3) Yes - if you configure a form with a Model it will ask the Model to validate itself, showing any errors on the appropriate field. This makes it easy to create very powerful validations