Google and Bing leapfrogging

It seems that Google and Bing release new features almost every second week, in a bid to try and establish dominance.
Bing has a new Visual Maps feature, which tries to outdo Google Earth and Google Maps. It's similar to Google Street View, but adds some mash-ups, many of which are more applicable to the USA than here, but no doubt will migrate before long. One particularly clever app is Photosynth, a photo-management tool from Microsoft that stitches together digital images to create "synths" - 3D renderings of multiple photos of the same scene. Bing users can rotate and view the synths from many angles. The more photos supplied by Bing users, the better the 3D effect.
Meanwhile, Google has a released two new features: a dictionary in English and 27 other languages, plus the ability to search in English across websites written in other languages.