What I'm getting from your post, is that you would like to know if the Sony SMP-N100 is a supported Audio and Video source.
Unfortunately that one is a non supported device, however, you can use the Remote Control Request from the forums (please note that we can't assure that you will get the codes right away, or that there will be an IR Code for that device in the future).
Besides that, you can use the following link which will show you the devices that we support.
The OP is asking to use the Sony SMP-N100 as a slingplayer.
I too would like to do the same thing.
To be clear... NOT a video source to the slingbox... But a remote receiver of the content.
The player exists for WD TV.
Can we assume that Sony does not want to play ball and have the player available for some reason? Or is it an issue of there aren't enough users who want this?