Piyush,
Unfortunately no other connectors will likely work with Sun ONE 6.1. But since the app server does not even support the JSR-45 spec, there is no hope of debugging with that app server.
That being said, if you merely wanted exploded deployment support, you *can* already do this with a custom location exploded deployment. When you go to create your deployment, select a Custom Location deployment, and deploy it to the Sun ONE directory. You will have to start/stop Sun ONE yourself, but MyEclipse will handle the deployment.