The box mentioned linux compatibility, but I wasn't expecting to find source code to the configuration program for linux.. afterall these things can be run without any computer intervention, so I figured that's why they listed linux.
The copyright notice on the source files is a bit odd though:
/*
dlanconfig.c: dlanconfig software for HomePlug devices for linux
Copyrighted 2007 by devolo AG
Redistribution in source form, with or without modification,
are NOT permitted.
This program uses explicitly confidential information
about HomePlug standard.
*/
Anyway... first impression is positive... the speed is nice, stability also.. the 200mbps claim is a bit misleading since they just have a 100mbit ethernet port, but all of the homeplug devices use that marketing ploy.