Unfortunately for you SWTOR fans the invincibility cheat has just been patched. The 1.0.2 patch was released yesterday and addressed the /getdown cheat in the game and put a stop to it. The patch also fixed a few other bugs and glitches but not the Ilum problem it seems. It may take Bioware a bit longer to sort out that one.
You can check out the patch notes here if you’d like. Although I’m sure you’re still lamenting over the loss of easy invincibility. Oh well, maybe someone will find another glitch to exploit in the game. Until then you’ll have to go to Ilum and raid high level chests! (Disclaimer: Don’t do it unless you want to get suspended by Bioware)