Came across this a few months ago...
Allows you to install it as a service remotely, and then allows you to perform operations on the PC's it resides on. I use it to shutdown our PCs at night to save power costs.
However, I also had cause to use it yesterday to create a telnet-esqe command prompt on a remote workstation in order to hide the contents of a childs USB stick, as they had it filled with things like a portable GTA installer etc.
Of course, USB sticks aren't shared as standard..but using this remote command prompt I was able to just type "attrib +h f:\*.*". He then came in and said "I'll have to format it..it's gone faulty. It's blank, but says it's got 75mb used..".
ROFL at the attrib! I'll have to remember that one!