I'm late on this, but it appears to be good: buddybuzz seems to be a nice tool for your cell phone. It is designed by the the Stanford Persuasive Technology Lab (which studies how technology modifies behavior). Basically, it helps you find the most interesting articles to read, based upon your friend's ratings and enables you to read 300 to 800 words per minute from on your cell phone. You can get it here. It reminds me a project we had with an important mobile company in which we designed a similar system with rating capabilities. Unfortunately it did not work so well; anyway it was not the same context and not the same users, so we cannot draw too much conclusions from this previous experiment.