Please leave your HSBC bank referrals in the comments of this page. There is a bonus offer of $50/$250/$500, and the referrer also gets $100-$200. Full details on these offers can be found here:
Update: Readers note that you need a full name in order to use the referral. Best bet is probably to put email addresses in the comments and then you can exchange info via email. Or you can leave your name if you are comfortable with that.