Apple’s App Store surpasses the 500,000 mark

Apple’s App Store, the store in which iPod, iPhone, and iPad users buy and download applications, has surpassed 500,000 approved applications according to a combined estimate by Chomp, 148apps, and Chillingo.

LinkedIn reaches 100 million users, but how many are coming back?

LinkedIn, the social network centered around professional networking, has announced this morning that it has crossed 100 million registered users, making it the fourth American social network to do so after MySpace, Facebook, and Twitter.