I found a web-based decoder for QR Code 2-D barcodes. I took a picture of a QR Code barcode with the Camera app and uploaded it using the online form and it decoded fine. It was just a URL though. Barcodes with more info in them might require a camera with higher resolution.

Try taking a picture of this barcode and uploading it. The response should include the URL for wikipedia.



http://zxing.org/w/decode.jspx