Erasmus - landside of the main terminal is really not that bad, but it's just pretty boring. Get some Soles, hop on the Internet, grab a beer - time will go by pretty fast. Not as terrible as we're making it out to be.
Once you get into domestic departures, past security, however, it's a craphole. Although, as I said in another forum, the *ancient* Aerocontinente planes sitting around the terminal make it kinda like a museum visit.
rockdoc could probably answer the lounge question pretty definitely. You might want to email him.