I also put in some of Schoenberg's interesting arrangements, like the intimate and angelic chamber version of Mahler's Das Lied Von Der Erde, and orchestration of Bach's St. Anne Prelude and Fugue, BWV 552. At the end of the playlist there are 4 Johann Strauss II waltzes transcription by Schoenberg, Berg and Webern respectively.
Some links: the wiki page and the Google Directory of the Second Viennese School, the libretto of Berg's Woyzeck, the poems used in Webern's lieder, and New Grove Second Viennese School on Google Books. To my knowledge the libretto of Lulu is still under copyright so it's not online yet, I booked The Cambridge Opera Handbook to Lulu but I doubt it will offer the full libretto. Anyone offers a online resource will be much appreciated.
If you want to recommend interesting works by lesser known composers of the Second Viennese School, please post your comment here and I will add into the playlist. Looking forward to suggestions:)