Less than 24 hours after Amazon announced that it has commenced shipments of its new Kindle 3 models, the company’s website makes it clear that its brand new Kindle Wireless Reading Device, Wi-Fi, 6″ Display, Graphite – Latest Generation, priced at just $139 without 3G connectivity, has taken over the lead as its #1 bestselling product. Here’s a screenshot of Amazon’s bestselling electronics items as of 5 a.m. Eastern time Thursday, August 26:

It’s still possible, of course, that the aggregate total of sales for the two different color models of the $189 Kindle 3G Wireless Reading Device, Free 3G + Wi-Fi, 6″ Display, Graphite, 3G Works Globally – Latest Generation still exceed totals for the wifi model, since the $189 units hold places #2 and #3 on the electronics listings.

Although the $189 models proved more popular with Kindle Nation citizens in the recently closed Summer 2010 Kindle Nation Citizen Survey, respondents did make it clear that they would be buying boatloads of $139 Kindles as holiday gifts for household members.

For more information on the new Kindle 3 units, see Ten Reasons the New Kindle 3 or Kindle Wi-Fi is a Must if You Love to Read … And a Few Minor Drawbacks (Excerpts from Kindle Nation Dailys Complete Users Guide to Your New Kindle 3 or Kindle Wi-Fi), now available for 99 cents in the Kindle Store.