I would love to see what you did with VMWare ESX done with the MIBS that are provided by these 3 manufacturers custom mibs for the listed products.
That meaning, you would be able to see the chassis status of the servers, fans, memory, hard drives, LUNS, Logical Disks, etc.
Additionally you could toss in all the neat stuff these mib sets add to the system. Detailed OS information, IP Addresses on all interfaces, etc.
I have a majority of these done today with the Universal Poller, but when placed on the view, creates a mess of information due to limited ability to organize. Additionally, its quiet a bear to maintain via the UdP.