ReadWriteWeb

Regator, the popular blog directory and feed reader, just launched its iPhone application (iTunes link). The app, which is available for free, allows users to browse stories from over 500 topics, ranging from travel blogs to pop culture and sports blogs - with a bit of beekeeping and local news from around the world thrown in for good measure. Every one of these topics is curated by Regator's staff, which ensures that only high-quality blog feeds make it into the app. Every topic also comes with its own memetracker-like 'popular' view and a list of currently trending terms within each category.

A new Y Combinator funded startup called GraffitiGeo has just launched with a fresh spin on user-generated reviews. The mobile application is somewhat like a mashup of review site Yelp, mobile social network Foursquare, and social news site Digg. The Digg-like element of the application is the easiest piece to use: like that restaurant? Vote it up. You can also leave more detailed comments to go along with your vote, if you so choose. To encourage people to participate in the "game" aspect to the app, GraffitiGeo also introduces a point system whose concept is borrowed from mobile app Foursquare...but is a bit more confusing.