DP Review checked out the Canon PowerShot SD400, which is also known as the IXUS 50 in Europe:

Like the SD300 before it, the SD400 incorporates two UA (Ultra-high Refractive Index Glass Molded (GMo) Aspherical lens) elements which has allowed Canon to produced its smallest cameras yet to feature a 3x zoom. It may be smaller than a credit card, but Canon has still managed to cram a fairly comprehensive range of features into the SD400..



Link: DP Review