As previously announced, later this year, ECM Records will release a new trio recording. According to the press release for the Berkeley concert (April 1, 2012), "Somewhere" is actually a recording of the July 11, 2009 concert at the KKL in Lucerne, Switzerland. That concert was a pretty short one (about 75 minutes, no intermission), so it's not impossible that "Somewhere" is a complete recording of the concert (but it remains pure speculation, at the moment).

"Later in 2012, ECM will release a new trio recording, Somewhere, recorded in July 2009 in Luzern, Switzerland featuring extended versions of "Somewhere" and "Tonight" from West Side Story."

Thanks to Håvard for the information (posted on the Keith Jarrett Yahoo! Group)!

Update (April 15, 2012). It appears that "Somewhere" will be released in 2013, for the trio's 30^th anniversary, not in 2012 as previously announced. Another album will be released in 2012. More information coming soon (I hope).