It is the most used language in Suriname. The only place you will not find it used might be in the government.
Sranan is the mostly used language here. For many years the Dutch suppressed Sranantongo, but now it has risen to become the most spoken language in Suriname. With such an extreme population of immigrants, many due not speak Dutch or English here, everyone is expected to know Sranantongo. There is very little written online, but if you know English, it will not be hard to learn.
Sranantongo goes by many other names. Sranantongo may be the most common, however, you will also find these descriptoins also:
1. "Sranan Tongo" (the other form)
3. Taki-Taki (but rude)
Fa waka? - What's up? Literally: how's (your) walk
Fa go? - How are you? Literally: how's (it) going?
Fa yu tan? - How are you?
Ali sunny bun? - (is) everything well?
Mi lubi dati! - I love that!
Mi sorri! - I'm sorry!
Omeni wan? - How much is one? (What's the price?)
Mi gwa! - I'm leaving
Mi go na oso - I'm going home
Mi go na winkri - I'm going to the store
Useful Links to Study Sranantongo
A Wikitravel guide: (but little info)
Sranan Top WordList
Websters Sranan Online Dictionary
Sranan Verb Usage Lookup Tool
Most useful guide I found:
Best Sranan Site - But a little too over complicated
Sranan info in Dutch
For Practice with the Language:
Wikipedia recently added a Sranantongo version of their website.
All sources from: http://www.sil.org/americas/suriname/Sranan/English/SrananEngDictIndex.html
and from living in the country of Suriname for over four years. My wife is also a native born Surinamese.