Im certain that someone has posted about this application, but I went several pages back and didnt see any postings.
I just tested then purchased the application: "Remote Desktop for Mobiles" http://www.desktopmobiles.com
I am here to tell you that this little application does it all. If you need to remotely control a desktop or server - done! If you need to reboot or shutdown a machine remotely - done! If you need to see local or network drives on a machine - done! If you need to run applications - done!
It is amazing. It cost me $30 to be able to take full control of my network (desktops and servers) while I am driving in my car or sitting at a ball-game. It works via BES or TCP/IP and works just like RDP on Windows XP - but all from your Blackberry.
Priceless - I recommend it with two thumbs up!!