It is always a pleasure to welcome new SharePoint Seach bloggers and so I warmly welcome and recommend Christopher Even's new blog on SharePoint Enterprise Search.
He is very knowledgeable about SharePoint Search with many big Enterprise Search Developments behind him. He is furthermore a top expert on Protocol Handlers and IFilters having developed a generic protocol handler for SharePoint 2003 and 2007. I have seen it in action and it can literally index content (not just data as the BDC) from any external system with full security mapping and the lot. Very cool stuff!! I hope he will blog more about it some day.