Talk about specialization. Taptu is a free app (available for the iPhone and Android) that aims to help you find and get the most of "touch-friendly" content on your phone. I have been playing with it on my Nexus and, although I don't find it replacing Google for my searches, it does provide an interesting experience with a great design. From their website:

Discover the touch-friendly web

With Taptu you can search and discover mobile touch content. Taptu is designed specifically for touch-screen mobiles so you can search and browse. Taptu finds the newest and hottest touch-friendly sites and apps which are optimized for touchscreens with finger-friendly navigation and lighter pages for faster loading.

Update: after seeing their demo video, I decided to download the iPhone version on my iPod touch. The app is so much better compared to the Android version, and I can now understand the buzz around it. Hope the Android version can catch-up soon.