Down at WES... In the session on the VS plugin and the labs RIM is showing the new debugging functionality....

There is also a video on the developer section of the blackberry website showing the debugging capability that will be available "soon" in a public beta..

Media Library

Here is the link to the whole video library on VS.. they show a bunch of functionality that will be coming.
BlackBerry - Developer Video Library

Until then.. I guess it is Dialog.display() and Debug.write() methods