Finnish has arrived! ...on Lyrics Training
I don't know how long it's been up because I haven't visited the website for a month or two, but there is still a bright red "NEW" tag next to their Finnish option.
I seem to remember Lyrics Training unveiling on Catalan around the time it entered the incubator. Also, all the rest of their selection of languages reflect those of Duolingo.
Might this be an indication of which way the wind is blowing?