Some of the forums and websites currently showing relevant discussion and genealogy are 

• genforum.genealogy.com - The variants of the Lousada name commonly used in the US include Luzadder and Lewsader. Find Lewsader Family Genealogy Forum via http://genforum.genealogy.com/cgi-genforum/forums/lewsader.cgi
• ancestry.com - the Rochfort Family Tree 1 has Lousada entries - with permission see http://trees.ancestry.com.au/tree/20757232/family; the Coombe/Linton Family tree contains the Australian Linton Barrows; and the Combe Family Tree contains the Combes who married several branches of the Barrow family, the Massiah Lindo tree (with permission) shows Barbados links with the Baruch Lousadas
• Facebook - the Sephardic Diaspora site created by Ton Tielen contains learned discussion based on original documents from Amsterdam and elsewhere; our distant relative Michael Waas is active here
• familysearch.org - this site offers the capacity for international and multi-lingual exchange of genealogical data
• geni.com - see the Baruch/Barrow/Lousada entries on http://www.geni.com/family-tree/index/6000000011736575318
• http://www.genealogyintime.com/index.html - this website was the subject of JGSGB online discussion in February 2014 and whilst some people felt it contained nothing new it was also felt to be a very convenient means of searching and indeed we have readily found Lousada material not yet found elsewhere