Canon has today announced two new Image Stabilized EF-S lenses. Utilizing an all new and considerably simpler stabilizer system these two lenses are virtually the same size and weight as the lenses they replace / upgrade. These two lenses in a 'combined kit' form would provide you with approximately 28 to 400 mm equiv (14.3x) field of view, with image stabilization, on an EF-S compatible Canon digital SLR (such as the Digital Rebel XTi / EOS 400D). No word on price for the 55-250 mm IS at this point but the 18-55 mm IS should be $199 when it arrives in October.
