Which notable Bitcoin-related sites offer referral rewards? TradeHill used to offer a referral bonus when you got other people to sign up with your link, and there are a couple other sites that offer similar rewards for referrals. Which notable Bitcoin-related websites offer such rewards?
Between TradeHill, Bitcoin7 and a couple others the offering of affiliate rewards ended up spawning a spamfest.  Fortunately, TradeHill added terms and conditions that included no spamming and withheld commissions to spammers and the problem mostly went away.

Camp BX apparently is one that offers a referral.  10% discount on trading fees for them and 10% commission for you.
After login, click on "My Profile" (or https://campbx.com/in/userinfo.php )
then scroll down to Affiliate Program Link.

Others:


http://clients.microtronix-tech.com/aff.php