This is a link to an article on Roberta Estes' blog "DNAeXplained - Genetic Genealogy". It warns about several small DNA testing companies that sell outdated DNA tests that do not give accurate results and are a waste of money. The name of these two companies are "AncestrybyDNA" and "DNA Tribes". One has a test called "DNA origins". So be careful when you are ordering your DNA test to use Family Tree DNA, 23andMe, Ancestry.com or the Genographic Project, who use the latest technology.
I particularly like the list that she has at the end of her blog that lists the things you can do with the test results from the outdated labs.
Happy ancestor hunting.