A 1997-vintage Q&A archive where linguists answer real questions about Portuguese usage.
Details
Run out of ISCTE in Lisbon, it answers submitted questions about grammar, usage, regional variation and the spelling accord, and the searchable back catalogue now covers nearly every argument speakers have about the language. This is where you go when a grammar book gives a rule and you want to know whether anyone follows it. Entirely in Portuguese and written for an educated native audience, so it is a C-level reference, not a study tool.