Amazon is sending around emails marketing its recently launched Kindle Fire tablet. According to the subject line of that email, the Kindle Fire is already the company’s bestselling item on Amazon.com.

When it launched, it was almost guaranteed to be a big seller with the Kindle brand behind it, as well as the $199 price tag – much more affordable than the iPad (granted, you get what you pay for).

The holiday season has already provided a tremendous boost to the Kindle Fire’s sales.

“This was a great Black Friday for Target and for Kindle Fire, which was the bestselling tablet in our stores on Black Friday,” said Nik Nayar, vice president merchandising, Target. “We’re excited so many guests chose Target as their destination for the new family of Kindle devices and we’re sure Kindle Fire will continue to be at the top of wish lists this holiday season.”

“We knew Kindle Fire and the new E Ink Kindles would be highly desirable gifts this holiday season,” said Wendy Fritz, senior vice president of Computing, Tablets and e-Readers at Best Buy. “If this Black Friday was any indication, they are only getting hotter as we get into the shopping season.”

We’re still waiting on Amazon to release its Cyber Monday numbers, but there’s no reason to think the Kindle Fire didn’t continue to be a hot seller on the site.

It’s worth noting that even though Amazon runs its own version of Android on the Kindle Fire, and that Google and Amazon are becoming bigger competitors, getting Android in that many more hands (particularly in tablet form) has to be a good thing for Google.