A funny thing is that, in Castilian (Spanish spoken in Spain), the word "Internet" is always used without an article.

We do assign the masculine gender to it when we attach adjectives to it, but never an article, which actually is a bit strange once you think about it.

For example, "the Internet is full of X" is "Internet está lleno de X". To refer to a slow Internet connection, we would say "Internet va lento" or "me va lento Internet". No trace of "el Internet".

Also, I think in Latin America they treat it as feminine and always attach the definitive article, so "the Internet" is "la Internet".

And as a last comment, just to see how crazy language is, we always use "la intranet". Maybe because that is a "concrete" place, while the Internet is a more abstract medium.