“Privacy” has been in the headlines a lot this past week, from lingering uncertainties left by the Tiger Woods story, to Eric Schmidt’s widely derided anti-privacy statements and Facebook’s (also derided) security changes. Which makes it strangely apropos that Techcrunch reported Friday on Blippy, a still-in-beta service that shares your credit-card transactions with your friends online. That’s right, share your credit card purchases with friends. Online. Sure, you might think that that’s probably the last thing you’d want to do, but, in all fairness, some people would.

Blippy blasts where you are and what your purchasing tastes are. If you buy from iTunes or Amazon, the Facebooky interface will not only show your purchase amount, but also the items you bought. This is in addition to the amount you paid for these.

Obviously, you don’t want to blast everything you buy, so Blippy recommends putting a sticker on your “social” or “shared” card, so you know the purchases you make are safe for public viewing.

I can understand the draw to certain segments. Some people do tend to define themselves by what they buy. A centuries-old phenomenon (even Abbot Sugar in the 12th century defined the metaphysical underpinnings of his design of the first gothic church, St. Denis near Paris, through the expensive ornaments he was able to fill the church with), but now it is becoming increasingly easier to tell people exactly what you are consuming and where.

And now you can tell them how much you can afford to spend on these things while you’re at it.

By Mark Alvarez