First up - for Christmas Eve and Christmas Day only (24th and 25th of December, just FYI), you'll be able to pick up Battlefield 3 at 50% off. Unless you're German, then you only get 33% off since Santa said you'd all been bad eggs this year. This promotion for EU territories only.
Lastly, from the 27th of December right through till January 8th, if you buy two or more of any selected titles you get 50% off the entire transaction. Selected titles include: Battlefield 3, FIFA 12, FIFA Manager 12, NFS The Run, Sims 3 Pets, Sims 3, Sims 3 Ambitions, Sims 3 Generations, Mass Effect 2 Digital Deluxe, Alice Madness Returns and Crysis 2.
Again, another EU only promotion, although if you live in Norway, Sweden, Denmark and Finland, then the offer doesn't apply with Battlefield 3 because... well... we don't know. I guess Santa's got beef with you too this year.