Welcome to the Cove, jdm!
We have had a number of lively discussions about the relative value of Six Sigma certifications, including the basis of the cert issuer.
There are a large number of consultants who apparently will certify based on training and passing an exam - it appears not all require the project.
The value is in the eye of the beholder: the employer. I have read that GE, Motorola and Allied Signal are still the mosr respected certifiers. However, that doesn't necessarily count out the potential approval you would enjoy from going to the effort. It's just hard to predict who would take unknown certifiers seriously.
I hope this helps!