What about other uses of the word "Arduino"? In general, we're happy to see people talking about Arduino, writing tutorials about Arduino, discussing projects that use Arduino boards, using the Arduino software with their hardware, etc. The project depends on the creations of the community, and we want to encourage these activities.
We do, however, have a few requirements:
what you are referring to must, in fact, meet the guidelines described above, you do not imply that your work is affiliated with or endorsed by the Arduino team if you haven't talked with us, you do not include the word "Arduino" (or derivatives thereof) in the name of your product, company, or domain name without permission