In March of 2007, 2K and Irrational Games asked gamers what they wanted in the Collector's Edition of BioShock. Apparently, the Big Daddy figurine won out. The Collector's Edition is rumored to sell for close to $70.
Another news article reports that the "International" Collector’s Edition contains these bonuses:
-Limited edition embossed metal case packaging (must be heavy)
-"Making Of BioShock" DVD
-Hand-finished resin Big Daddy figurine
It is not confirmed if the North American (US and Canadian) Collector's Edition includes the exact same contents, but they should be the same.
The regular edition of an Xbox 360 game usually costs about $60. If the Collector's Edition is about $70 as rumored, then it will be an absolutely great bargain at only $10 more than the regular edition.
More Updates: Gaming Today reports the price of the Collector's Edition is $69.99.