The story has been corrected on the wire and the second, third and 31st paragraphs now read:

As implementation costs go down, however, there are specific applications, including asset tracking and supply chain automation, where RFID technology makes sense, says Rebecca Wettemann, an analyst at Nucleus Research Inc. in Wellesley, Mass.

"There was a lot of excitement about RFID for a while, and then people took a step back and asked, 'Is this really ready for prime time?' in terms of being cost-effective and in terms of being a better alternative to the bar-code and scanning systems," says Wettemann. "As tags get cheaper and the infrastructure to manage all of that data gets cheaper, there are other areas where RFID makes sense, including in the retail environment."

Using RFID to track Viagra makes perfect sense for Pfizer, says Wettemann. "We see people tending to adopt RFID more when whatever they're tracking has a higher cost," she says. "Counterfeit Viagra is a huge financial issue for Pfizer and a liability as well, so it may make sense for them to track that stuff more effectively."