The current Beta version of Live 8 is Live 8.4.2b2.
Download links:
Windows 64-bit
Windows 32-bit
Mac OS X 64-bit
Mac OS X 32-bit
Read the release notes for Live 8.4.2b2
* Please note that automatic updates and the collection of usage data are always enabled in beta versions. More information about usage data collection can be found in our Knowledge Base.