The gadgets we use to access the internet are getting smaller and more powerful.

Take the once-humble cell phone. A 2009 study highlighted by the Mobile Marketing Association found that 64% of respondents had an internet-capable phone. Of those who can get online through their phone, 43% actually do. These numbers represent a growing share of American adults and teens. We used to not be able to get online anywhere but through a computer, but now that we can tap into the internet through our phones, we are doing so -- at increasing rates.