It is available from angular 2.0.0-rc2, if I'm not mistaken, at least in the current rc4. This is no longer a global setting, but a metadata property for each component.
@Component({
selector: "my-comp",
templateUrl: "some/url/some-file.html",
...,
interpolation: ["{:!", "!:}"]
})
...
And in the component template, some/url/some-file.html
you can use these delimiters:
<div>{:!myExpression!:}</div>
- , , .:)