In the initial release of eclipse-scala-tools provides SBT 0.7.x support on Eclipse.
You can create a SBT project using wizard.
Run SBT command from the context menu of the project. You can also migrate existing SBT projects by 'Migrate SBT Project to Eclipse'.
By this plug-in, we would be able to use SBT with Eclipse without special method such as Eclipsify.
I'm planning to add some more features to eclipse-scala-tools such as unit testing support.