its a good answer, but the fact is that the pc players DO get them and alot DO use them as fun little cheats. i think its only fair to add similar commands into the other console versions, no?
If they did (and I don't see why not as long as it disables achievements in your saved game) they should make some that are specifically for the purpose of being cheats, I think. If a PC user messes up their game they have tools at their disposal to fix it that the console users don't have. I'd be pretty upset if I used a console command on my 360 that screwed something up that I didn't notice right away and by the time I realized I'd done it I didn't have any of my old savegames anymore.

I personally don't like to use cheats, but the dev console has saved my butt in the past when I got stuck on something and otherwise would have had to fall back on a saved game from an hour ago or more.