Tushar Samant, the webmaster for the Umbrella Music organization, has just launched a new live music calendar for the jazz, experimental, and improvised music communities. The calendar attempts to fill the large void left by Malachi Ritscher’s Chicago Rash Audio Potential (which itself was a replacement for Seth Tisue’s Chicago Now list). It doesn’t have a name yet, and the current URL is temporary, but it’s good to see someone stepping up to advocate music that has too few reliable supporters.