Back in the middle of August I wrote about the difficulty finding public research about RFID (radio frequency identification) stock investing.

Well, here we are 4 months later, and that is changing. It seems that Wall Street is catching on to the huge promise that RFID holds.

I was prompted to take another look at this subject earlier this week, when I heard a commentator on CNBC, the American financial TV channel. He was touting RFID and in particular, Verisign. (Unfortunately, I missed the analyst's name, because I just tuned in for a few minutes as I sometimes do when working in my office.)

The good news is that there are now some promising new sources of RFID stock investing information. I'll cover two of them today:

• RFIDInvesting.com: As the name suggests, this site is dedicated to providing investors with a "Global News Portal & Research Resources to Track NASDAQ, Amex and OTC Stocks." This site maintains a list of publicly-traded RFID stocks.
  
  One thing I like, too, is that they list all of the RFID stock charts on a single page. That saves a lot of time.
  
  Right now the site seems to be mainly an information source, and I couldn't yet find a lot of commentary or opinion on RFID stocks. But the site is very very new, so I expect the commentary will come.
• Motley Fool: The Fool has initiated commentary on RFID, through columns such as this one and through their subscription services. There is also a discussion board dedicated to RFID.
  
  Here's a sample from one of the articles: "...he provides a frank assessment of the public companies that he favors in this promising sector, such as Zebra Technologies (Nasdaq: ZBRA), Hewlett-Packard (NYSE: HPQ), and UNOVA's (NYSE: UNA) Intermec, as well as those that he sees having an uphill climb, like pet and human RFID tag specialist Applied Digital (Nasdaq: ADSX)."