[EDIT 2] "If you're an existing user, you don't need to do anything—you'll be updated automatically." - This is not yet true. Refer to Bob's comment in this thread.
www.sophos.com/en-us/products/free-tools/sophos-antivirus-for-mac-home-edition.aspx
The main new features are that SAV 8 includes scheduled scanning, live "in the cloud" lookups to verify detected files (resulting in fewer false-positives), and an improved user interface -- based partly on the feedback from this forum. It also includes under-the-hood improvements in how it interacts with OS X, which should fix the problems some users have been having with encrypted or backup volumes.
[EDIT 2] "If you're an existing user, you don't need to do anything—you'll be updated automatically." - This is not yet true. Refer to Bob's comment in this thread.
www.sophos.com/en-us/products/free-tools/sophos-antivirus-for-mac-home-edition.aspx
The main new features are that SAV 8 includes scheduled scanning, live "in the cloud" lookups to verify detected files (resulting in fewer false-positives), and an improved user interface -- based partly on the feedback from this forum. It also includes under-the-hood improvements in how it interacts with OS X, which should fix the problems some users have been having with encrypted or backup volumes.