ALERT! Ancestry.com DNA testing is on sale for $69 for the four days after Thanksgiving starting now. Also you can save 20% on gift memberships at Ancestry.com– scroll down that same page to see the offer. Click on it for even more membership offers.
Addendum [29 nov]: To see a sample of what you get with an Ancestry DNA test read this old post of mine: http://blog.kittycooper.com/2014/08/in-defense-of-ancestry-coms-dna-offering/