I wouldn't suggest on DreamHost's own forum that people try to use a code that wasn't meant for them that DreamHost itself says they check for proper use.
Think about it. If they discover you're intentionally trying to use a code that wasn't meant for you and perhaps even trying to transfer a domain that isn't your own, I wouldn't blame them for banning you from their service. And is it worth it for $23?
BTW, I think it would be slightly mean of them to do this, but come on. DreamHost provides good service and great value already and has very generous promotional giveaways as it is. Their birthday promo code was a mere $9 shy of the lunarpages offer, and the lunarpages folks deserve a break after getting treated the way they had been.
Apologies for the rant.
Free unique IP and $67 off with code [color=#CC0000]LMIP67[/color] or use [color=#CC0000]LM97[/color] for $97 off. Click for other Dreamhost coupons / promo codes