I was keeping up with this while they were still 'fresh' on fansub. At the end of the performance, Haruhi mentions that people could 'stop buy afterwards to get a recording of ENOZ's songs'. A few days later, a CD was actually on sale in Japan. Consequently, that's the same day the fansub was out, and a quick google after I watched the anime supplied me with a fresh MP3.

Haruhi Suzumiya, breakin' the 4th wall.

Also, Season 2.
(SPOILER)It was leaked on the 'netz a couple days before, but thar lies the official announcement.