We found our dream house with Tony Iardio (sp?) and his partner Peter. He has an ad in the Panarama back section. Tony is well-known and respected in the housing office so you can be sure there will be no problems or surprises. They both listened to what we wanted and what our concerns were and held our hands the entire way. Both speak English very well (Peter has dual citizenship) and live in Lago Patria.
We also tried to use Tina out of Pinetamare, as several of our colleagues had found housing with her. We did not have a good experience with her and found we simply could not trust the information she gave us. She has a limited number of rentals available to show and does not have access to housing, which is a huge problem. You definitely want your agent in the housing meetings and contract signings with you! If you are looking to live in Pinetamare then she is a good source, otherwise I would not recommend her.
As an aside, we also went out with a housing employee twice and found that to be a waste of our time. He showed us houses that were clearly not what we were looking for which made me think he was looking for a kickback from the landlords. The process itself is a big joke, as they ask you to make a list of possibilities from their database. But your rep does not call to make appts until the day of your tour, thus limiting your options to the few that may answer the phone and be available that day. I think the housing reps should schedule their tours with landlords at least a day ahead, to ensure someone is available. I also did not see any effort to double up tours, which is supposed to be an option.