Sorry, that should be: rdmd -od%cd%\ filename.dNotice the backslash there. Otherwise it will create an executable on the root drive with the name of the folder you're compiling in. Funky.. Anyway there are more switches here: http://www.digitalmars.com/d/2.0/dmd-windows.html#switches
Now that you mentioned it, I did find the executable one folder above where I executed rdmd :P, but what you wrote works, yay. Thanks!