This new version is compatible with VMware vSphere 4, and unlike competing products, also provides 64-bit OS and Windows 2008 support.  

Veeam Monitor 4.0 and Veeam Monitor Free Edition 4.0!
This new version of Veeam Monitor includes:

• Support for VMware vSphere 4
• Storage monitoring
• Hardware monitoring
• And more new features requested by customers like you

New Features:

- Full ESXi support;
- Improved file copy scheduling options;
- Improved user interface;

Release notes: http://www.veeam.com/vmware-esx-server/fastscp/documents/veeam_fastscp_3.0_release_notes.pdf

Download: http://www.veeam.com/esx-fastscp.html