My own opinion.

We all agree that the Internet is a huge source of information. One can find all he wants, if he knows how to work there. So it's one of the goals - to learn to use the Internet. Besides there are so many tools that can be used at the lessons and after them - to involve students and arouse their interest in learning English, for example blogs, wikis, podcasts, webquests. There are educational sites for creating exercises, tests, crosswords and many other things.
The problem is how to learn to work with all the material given in the Internet and not to get lost. How to find the sites that suit your needs according to your class level, topics you study, your and your students' interests. There is also a problem with computer classes - we can't get there any time we want, and that creates additional difficulties.
What's your opinion? I'm sure you have you own arguments for and against....