The MSP430 Value Line range of microcontrollers is available from the big electronics distributors such as Digikey, Mouser, Farnell and RS Components.
The MSP430 Launchpad can also ordered directly from the TI eStore (last time I checked, they seemed to offer free world-wide shipping for Launchpads).
In Germany, Farnell and RS Components will only sell to business customers and for small orders, the international shipping charge when ordering from Digikey or Mouser dwarfs the value of your items.
If you are a student at a university, Farnell will make an exception for you.
www.hbe-shop.de offers Farnells catalog to private customers.
The MSP430 Launchpad development board is available from some shops focused on hobby electronics and robotics. I ordered mine from www.watterott.com.