HSBC Never Sent Us Singing Kittens.
To drive us into the arms of BankWest (Australia), some kittens sang us a song. It was weird and they were scary (like furry robot gremlins), but they spelled our names and everything.
The campaign was put together by Host and Glue Society. Its purpose is to associate banking with happiness. (Guess that depends on why you're at the bank, though.)