Remember this deal? http://www.ozbargain.com.au/node/46483
I was just about to claim some more cash back on my card, and I thought "hmmm, I wonder if the CBA boffins have remembered to deactivate this promo…" To my surprise, upon calculating my cashback amount with the mybonus101 code, there was an additional 10% added!
Maybe Giftcards101 is still active too…
Mod edit - Added True, as in "True Awards" to title for clarity and ease of keyword search.
Just checked and your are right, it does still work.
Giftcards101 is no longer active however (they actually seemed to de-active this one before the end of the last promotion).