Shame no one has replied to you. The Internet is there and the best option which I know of is TV Cabo, there are representative offices all around town, you just need to find out where they are. Its a service where they stream TV and Internet over a cable into your house. I am not sure of all the costs, the initial setup might be a bit pricey($500-$1000), but its probably the best and most reliable you will find.
For travelling and having Internet on the move I would suggest getting yourself a Unitel and Movicel 3G modems from both providers, then you know you should be covered for most areas where there is reception. Hope this helps.
Just remember that you will notice that when there is power failures sometimes the Internet is also off. Weird.