We’ve had a bit of discussion as of late about running SQL on ESX. There are so many things to consider in storage, network, VM layout, etc. VMware has released a new whitepaper on all of those considerations. It’s really a very good summary of all things to consider when beginning to virtualize your Tier-1 applications. It has outstanding sections on CPU, memory, network, storage and availability. More good reading for Admins entering into this phase of virtualization.
You can find all of the details in the article here.