People today read latest topics and updates via mobile phones. Reading the tweet, Facebook updates and your favorite Digg is possible in phone, but still share the information is still challenging for for phone app makers. Recently i read about Smub.it, it offers simple social sharing and bookmarking tool that proves especially useful for iPhone and other smart phone users.
iGoogle gadgets interact with the user and utilize the Google Gadgets API. Some gadgets developed for Google Desktop can also be used within iGoogle. The Google Gadgets API is public and allows anyone to develop a gadget for any need. iGoogle recently added a new gadget named " What's Popular". It seems to be similar to Digg, Reddit, Stumbleupon. where you can vote the web pages and add content you find interesti
StumbleUpon is an Internet community that allows its users to discover and rate Web pages, photos, and videos. StumbleUpon allows users to web stumbling for the first time