We're an all Dell shop, with over 400 S-Series switches. Most of our switches are stacked, but there is no native way to monitor the different stack-unit's status.
In the meantime, I have created custom pollers to get the information we need. It would be nice to be able to get all the information for a stack in one place, just like Cisco gear, and be able to report on it without having to create a new UnDP for any new information out of the switches.
As an example, this is what's built in for one of our stacks:

Similar FR's: