vMA stand for vSphere Management Assistant and the current version is 4.1. The vSphere Management Assistant (vMA) allows administrators and developers to run scripts and agents to manage ESX/ESXi and vCenter Server systems. VMware have said that ESX4.1 will be the last version of ESX with a linux service console. This guide will show you how to deploy the vMA appliance within your Virtual Infrastructure environment.
The vSphere Management Assistant 4.1 Guide document can be downloaded here and is well worth a read. The vMA is downloaded as a 440mb zip file and can be found here. A VMware account is required to download the software.
Once you have downloaded the .zip file extract it to a suitable location and log into your vCenter server with the vSphere client. You can deploy the vMA directly through an ESX host if you don’t have vCenter. The extracted .zip file contains the following files: