Use SBJsonParser/SBJsonWriter instead of NSObject+SBJson
Use SBJsonParser/SBJsonWriter instead of NSObject+SBJson

- SBJsonParser can be used standalone when JSON posting is not used
- No NSString -> NSData conversion when encoding
- Possibility to implement error handling (although [parser/writer
error] returns a NSString...)
- Documented interface:
http://stig.github.com/json-framework/api/3.0/interfaceSBJsonParser.html
http://stig.github.com/json-framework/api/3.0/interfaceSBJsonWriter.html

skillz/AFNetworking