How about 3.3Vreg + ADXL345 + ITG-3200 + HMC5883 + BMP085 ?
Since many people will want to use it with 5V micro controllers, I think adding an I2C bus 3.3V->5V level converter is also a good idea.
Found an item on eBay!
HMC5883L BMA180 BMP085 ITG3200 sensor board 5V LLC.