Yes, as others have already mentioned, there's no "easy" way to do this.
There is a micro-SD card that was advertised to have a video out for a display monitor, but all it really does is send slides from powerpoint presentations, not a true video out.
What you're looking for is something that will display the contents of your device's screen on an external monitor, or at least send streaming video content.
As darkjedi posted before me, there are over-IP screen output apps, and I've actually done some testing and wrote about my experiences with these here:
http://mobile-enthusiast.blogspot.co...teresting.html
I even recorded a video to show how well it played a streaming movie on the host monitor.
Only problem is, you need a computer to receive the signal and send it to the monitor, which sort of defeats the purpose here. You might as well stream the slingbox directly from the pc.