Although only available on 70 phones at launch, more will be on the way - and for the first time, Go works on non-smartphones. It's got a nifty carousel design giving you access to your email, local info and maps, news, sports, finance, entertainment, weather, your Flickr account - a long-awaited feature - and Yahoo's new oneSearch service.
I had a play with the beta today at Yahoo's stand, and it feels very slick. It's powerful too, with the ability to customise news feeds by adding in any RSS feed, for example. Uploading photos to Flickr is seamless, as well as browsing your contacts' latest pics. You can find out more and download the app from the link below.
Oh, but also, Yahoo said today that by 2016, it reckons more people will be using Yahoo through their phones than through their PCs, and it also announced plans to preload the Go app on phones from Motorola, Samsung and Nokia.