More and more folks are using mobile data cards according to Nielson… another sign of the growth of the Connected Era:

…Nielsen’s research reveals that the cards are beginning to play an important role in home and personal Internet access, as well. In fact, 43 percent of mobile data card users report they most often use their data card at home, while 15 percent say they typically use the card at work. Additionally, one in five (21 percent) data card subscribers take advantage of ubiquitous access by heading outdoors and 9 percent use their card while commuting.

GigaOm points to one of the reasons:

An easy explanation would be better price packages and higher speed tiers, thanks to newer 3G technologies. Of the nearly 1,300 mobile data card users Nielsen surveyed, more than 99 percent still kept their wired broadband service: 40 percent of card users also have cable broadband and 34 percent also have DSL in their home. That number can jump to 59 percent, giving wired carriers something to think about…