23andme has a discount just for today, according to Twitter and Facebook:
Happy Cyber Monday From 23andMe! Today only $25 Off Our Personal Genome Service®. Offer ends 12pm PST Click Here: bit.ly/uiuxbY
It says it ends at 12pm PST which is at noonmidnight PST on the US west coast. So you'll have to move fast if you want to get it.
Also, Harappa Ancestry Project is just two submissions away from 200 participants.
Related Reading:
23andMe Discount code 6YHFXF will get you $23 off through 12/31/11.