Apptism is an iPhone app activity aggregator.
Apptism indexes all iPhone apps from the iTunes App Store and aggregates all of the latest news, reviews, and media related to the iPhone apps.
Apptism’s focus is to also provide extensive searching, sorting, and filtering capabilities to help the iPhone community find and track apps within the constantly growing App Store:
Some additional unique features include: Comparisons, Related Apps, e-mail and SMS alerts, Watch List, Version History, and more.
Apptism is currently in beta.