In order to create my first, simple Kotlin project in Eclipse, I followed the steps in Getting Started with Eclipse Luna tutorial from Kotlin official website, i.e.:
This worked for me.... If you go to Window -> Show View -> Navigator It shows you more a physical layout of your workspace rather than the logical view by the Package Explorer. Right click the kotlin file with the main function defined and click Run As -> Kotlin Application. Worked for me, though I'd kill to be able to use a regular run config but such is life.....