Nicaragua's communications system rivals the best in Latin America, with the installation of new fiber-optic cables. There are several Internet service providers, cellular phone and pager service providers, as well as direct line service to the United States via Sprint, MCI, or ATT. The Internet providers use relatively new technology, allowing for 56K connections, but I wouldn't recommend logging onto the net for your weekly game of Quake 2 because the lag will make you the most unpopular gamer in history.
Cellular and pager coverage extends along the entire Pacific coast and into parts of the center. Expect to pay about 60 cents a minute for a cellular and 25 bucks a month for a really good pager.
As for the mail system, it's actually remarkably good with only a tiny fraction of the mail not reaching its destination. Like everything else in the country, it was recently restricted with automation, more delivery vehicles, and personnel training programs. And if that's not good enough for you, there's always DHL, Fed Ex, and a lot of international couriers.
Oh yes, for those of you who think that you can't live without your weekly dose of South Park, don't worry. There are several cable companies who provide up to 50 channels of US and international broadcasts including Pay-Per-View 24 hours a day at no extra cost (you don't have to pay-per-view because it's pirated).