The new Yo La Tengo, Popular songs, is available through Matador store feature "Buy Now Get Early". Preorder the album and get immediate access to two songs from the new album in FLAC - Periodically triple or double & Here To Fall.
Later in august the album will be available online as a stream. Exclusive MP3s will be offered and the physical album will come with a bonus album, the soundtrack to the movie Adventureland. You get a poster too! It's all mentioned here.
Thanks to OMG Vinyl for the tip.