Guayaramerín in detail
A block east of Plaza Hernán Roca Cazanova is the Brazilian consulate, which now takes two weeks to issue visas. You're better off applying in advance online or in La Paz.
There is a decent internet connection at Tigo Internet just off Plaza Germán Bush by the market.
Moneychangers hanging around the port area deal in US dollars, Brazilian reais and bolivianos. There are also several ATMs on Plaza Hernán Roca Cazanova.