(This may not be complete. Feel free to add.)
VMware Fault Tolerance
http://www.vmware.com/products/fault-tolerance/
FT Guide and Whitepapers:
vSphereTM Availability Guide
http://www.vmware.com/pdf/vsphere4/r40/vsp_40_availability.pdf
VMware Fault Tolerance Recommendations and Considerations on VMware vSphereTM 4 http://www.vmware.com/resources/techresources/10040
VMware vSphereTM 4 Fault Tolerance: Architecture and Performance http://www.vmware.com/resources/techresources/10058
Forum:
http://communities.vmware.com/community/vmtn/vsphere/availability?view=discussions
Knowledge base articles:
FT Compatible Processors
http://kb.vmware.com/kb/1008027
Tools:
Vmware SiteSurvey Tool
http://www.vmware.com/download/shared_utilities.html
vServer Center Cluster Compliance Check (part of vCenter)
If you can access VMworld 09 sessions online,
VMworld 2009 sessions:
BC3425 VMware Availability Solutions and Futures
BC3369 VMware Fault Tolerance Real-World Use Cases
BC2961 VMware Fault Tolerance Architecture and Performance
BC3197 High Availability - Internals and Best Practices
BC3370 FT Overview and Best Practices
BC3602 Fault Tolerance - vSphereTM Workflows and API Considerations (an online presentation)
BC2407 When to use Fault Tolerance in Virtualized Data Centers (an online presentation)
BC2260 Automated Disaster Recovery for Branch Offices using SRM and vSphereTM 4
BC3421 Site Recovery Manager Architecture & Features: The Road Ahead
BC2142 Data Recovery – Install/Configure and Troubleshooting