The Fender Squier Stratocaster guitar designed for Rock Band 3, the one with proper strings that can be used with a real amplifier, has been given an American release date and price. It will be out on March 1, 2011, and the price will land on $279.99 (yikes).
Fender has yet to comment on when the guitar will become available in Europe, but we would be happy as long as the other Rock Band 3 instrument (promised for launch) would make their way over here...