Through the end of the day, you can enter Coke, Diet Coke or Coke Zero 12-pack codes for 20 points. Not bad if you've been hoarding them.
Another free ten points for linking the Coke Super Bowl ad on their site to your twitter account. Remember, you need a twitter account that you use solely for these types of promos.
And finally, courtesy of a reader, enter code 10052147865684 for 10 points at MCR.
Everything you need is here.