It would be great to have a simple layer and easy access to start/stop vagrant instances from eclipse.

vagrant init could be a file new wizard that allow browsing repository of vagrant files and then execute the creation/downloading of the initial virtual machine data.

Once vagrant file is created this vagrant file would have contextual operations like:
up, start, stop, destroy etc.

Should have a view/menu for seeing current running machines and performing operations individually and across these machines (i.e. Pause All)

The view might simply assume any vagrant file in the workspace is a single machine that can be started/stopped, but also look at using vagrant global-status for detecting running ones.

http://vagrantmanager.com/ is a nice example of a simple and minimalistic UI