http://www.neogaf.com/forum/showthread.php?t=1240912
The above NeoGAF link gives all of the links and such, but:
1, 2, 3, PSP, VITA, and Karting are shutting down in Japan on July 31st.
PSP is shutting down in North America and Europe on July 31st.
Karting will shut down for North America and Europe on August 31st.