Trilead.com product is VM Explorer, it lacks some features such as scheduling and can you can only add 2 hosts but it's free and very easy to use. The pay version is nice.
I have 10 blades running Esxi 5.1 update 2. I have it attached to a 4 node equlogic san. It is configured as NFS since it was this way when I started.
There is also a old 6 node Left Hand SAN. I have heard if you use Thin provisioning on LH you can't reclaim deleted space. It seems to be...