ZOMG - support for scrobbling to both last.fm and libre.fm "simultaneously" since version 0.5.
As of version 0.5.7 zomg can also stream libre.fm radio.
(It looks like some files needed for this can only be found in Debian's package right now)
To play free music tagged 'Blues'
zomg -r librefm://globaltags/Blues
To play free music by the artist Abscondo
zomg -r librefm://artist/Abscondo
To play music by artists similar to Abscondo
To play the user Elleo's loved tracks
zomg -r librefm://user/Elleo/loved
To play music recommended for the user Elleo
zomg -r librefm://user/Elleo/recommended
To play a mixture of loved and recommended music for the user Elleo
zomg -r librefm://user/Elleo/mix
To play a selection of loved tracks from the whole Libre.fm community
zomg -r librefm://community/loved