As Armando, N8IGJ noted in his earlier email, NASA as published an update of today's activities ( it can be found at :http://www.nasa.gov/directorates/somd/reports/iss_reports/index.html) .Contained this document is a section about ARISSat
Dmitri performed hardware setup and test activation of the TEKh-43 Radioskaf-B "Kedr" microsatellite in the MRM2 Poisk module, connecting it to an 825M3 Orlan battery and checking out its 430 MHz transmitter from the satellite control panel. [The small satellite was named Kedr in honor of the call sign of Yuri Gagarin. It will be activated onboard the station tomorrow, April 12, i.e., Cosmonautics Day, when the world celebrates the anniversaries of the first human flight into space and the first Space Shuttle flight. Development, manufacturing and launch of Kedr is the first phase in Russia's integrated program approved by UNESCO, with the goal to create and operate mini-satellites with a mass less than 100 kg by combined efforts of students across the world. Once Kedr is activated, it will transmit 25 greetings in 15 languages, pictures of Earth, and telemetry data from science hardware and support systems, as well as historical audio recordings. 50 years after Gagarin's flight all ham radio operators across the world thus will have a unique opportunity to hear the famous "Poyekhali" (Let's Go!) from Earth orbit.]
Some clarifications: ARISSat-1, RadioSkaf-V, RadioSkaf-B, Kedr are all names for the same satellite. It is doubtful that the satellite will transmit pictures of earth as it is inside the ISS. ARISSat-1 only transmits on 2M. The ARISS team has arranged for the TM-D700 transceiver aboard the ISS to also transmit the ARISSat signals on 437.55 MHz. There are 24 different messages that will transmit in a sequence, one of which is the Gagarin-ground station conversation. The crew operates on UTC time and sleeps from 2130Z - 0600Z usually so probably no activity until after 0600Z The 12 April schedule found at http://www.nasa.gov/pdf/534825main_041211_tl.pdf doesn't specifically list an activity to turn on ARISsat-1 Keep listening, we'll let you know more as we know more.
73, Gould, WA4SXM