Give this one a go. It's maintained by one bloke so doesn't have everything up to date.
For FTTN addresses you can get an estimation of distance to the node and possible speed range (if it has been updated with your node info or to your pilar if not). Zoom in on your location and click on your address to see the info.
NBN MTM Alpha
Note that it only will have the info if pillar/node location has been identified and added to his database.
Alternative is the find your node and use google maps to measure distance.