MRTG-eth-probe provides a probe for the Multi Router Traffic Grapher, generating statistics for network devices that do not support the SNMP protocol. It reads interface stats from /proc/net/dev (or some other file you configure), and generates an output suitable for MRTG by parsing the file. Reading of remote data via SSH is supported.
Linux support dropped
In the meantime Porivo has been bought bei Gomez Technologies and the newest version of the Peer Software is only distributed for windows - though it still seems to be written in Java.
I just discovered this after accidently deleting all my mail from the past two years. This tool restored most of the data in just a few minutes!
Would be even cooler if it had the ability to restore filenames and directories...