HowStuffWorks, an online product reference site, has received a a “significant investment” from financier Carl Icahn. Entrepreneur Jeff Arnold, CEO of the Atlanta-based company, didn’t disclose the size of Icahn’s investment, but in an interview to Reuters said it amounts to “tens of millions” of dollars.

Icahn is not widely known for venture investing, but has an interest in Internet content as evidenced by his activist campaign in Time Warner, a company he claims has fumbled its Internet strategy with AOL.

The site has also made some distribution deals…more on that and the funding in the release...