Internet Cleanup is a bit of a misleading name for a program that not only cleans, but also protects your Mac from internet based attacks.
Internet Cleanup is a collection of tools which allows you to perform various functions from cleaning-up your hard drive to a NetBlockade school which can protect you from attacks. Installation is a bit annoying however - the installer took quite a while to run for me and then afterwards required my user password and a restart.
When you're up and running, most of the functions such as Bookmark Manager, Cookie Finder and Mail Cleaner are pretty straightforward. Others such as Device Sentry and NetBlockade are unusual options for a cleanup tool but basically allow you to block dangerous attacks online and from external devices connected to your machine.
Like most good cleaners, you can schedule scans and its also easily accessible from the menu bar. However, the preferences are extremely limited as they only allow you to "Secure Delete Cache files". Internet Cleaner has been recently updated to work properly with Snow Leopard although there are known issues on earlier versions of OS X which you can read about in the Public Notes below.
Internet Cleanup is a standard cleaning tool with a few unexpected bonuses that you might not normally expect from such an app.
