due to this forum and pjnewman perlscript he posted in this thread viewtopic.php?f=12&t=1792
I was able to write a Dashboard Widget for Mac OS X to control (my) Samsung TV. Thanks!
Tested on UExxD8090 but I guess it works for all C and D-Series TVs.
Unfortunately not all buttons work because I couldn't determine the right KEY_Codes but the important keys are working.
This is the first release. Comments are welcome

UPDATE:
25.11.2011 Version 0.9
All buttons work now, excepting the search button.