I just received my order of three of these "Chromo Inc." aftermarket Lightning cables -
http://www.amazon.com/gp/product/B00...ls_o01_s00_i00
I paid $1.98, plus $5 shipping, for each cable. I ordered on Tuesday and received them today (3 days later). While I hate vendors who rape you on shipping, I still got three cables for under $21, less than one Apple branded one would have cost at the Apple store, once sales tax is factored in.
The cables seem to work perfectly for charging, and work regardless of the orientation of the Lightning plug (apparently some of the aftermarket ones only work in one orientation). The cable is similar to, but perhaps a bit thicker than, the Apple branded one, and the USB end has the rounded shoulders used on older iPod cables. Also the end of the Lightning plug has a very slight bulge on the sides (much like the 30-pin iPod cables, but smaller) to retain the plug more securely, something I don't believe the OEM one has. Overall it seems like a fine product and only an Apple nerd would probably notice that it's not OEM.
I do not know whether the cables work perfectly for data transfer, but will report back once I've had a chance to try that.
Unfortunately since I ordered these cables the price has gone from $7 including shipping to $14 with free Super Saver/Prime shipping. At that price I might well have just gone for Apple branded ones. There are still other vendors offering generic Lightning cables on Amazon but none are as highly rated as the Chromo Inc.