Hi Ricky,
I have not yet purchased the Arduino Due but I'm also interested in using Eclipse with Arduino Due board in the futur.
I installed Atmel Studio 6.0 (it's free) there is the possibility of creating a project Arduino Due with (Atmel Software Framework : ASF). I know this is not what you want but it is better than the Arduino IDE.
You can download it here : http://www.atmel.com/tools/atmelstudio.aspx
Good luck.
Bye.
Nassa.