What aspects of the Internet, the information,

The Internet is a vast worldwide compilation of networked computers. IP addresses and the Domain Name System help ensure transmissions are routed to the correct recipient. Many applications such as e-mail, FTP, newsgroups, instant messaging, and chatting are available. The Internet2 and NGI projects improve on the current Internet configurations and will make it easier and faster to exchange information and data.

What aspects of the Internet, the information, and its applications available do you find most useful? Personally? Professionally?