Index: org/openstreetmap/josm/gui/download/DownloadDialog.java
===================================================================
--- org/openstreetmap/josm/gui/download/DownloadDialog.java	(revision 4096)
+++ org/openstreetmap/josm/gui/download/DownloadDialog.java	(working copy)
@@ -108,6 +108,7 @@
         downloadSelections.add(new BoundingBoxSelection());
         downloadSelections.add(new PlaceSelection());
         downloadSelections.add(new TileSelection());
+        downloadSelections.add(new IdNumberSelection());
 
         // add selections from plugins
         PluginHandler.addDownloadSelection(downloadSelections);
Index: org/openstreetmap/josm/gui/download/IdNumberSelection.java
===================================================================
--- org/openstreetmap/josm/gui/download/IdNumberSelection.java	(revision 0)
+++ org/openstreetmap/josm/gui/download/IdNumberSelection.java	(revision 0)
@@ -0,0 +1,112 @@
+// License: GPL. See LICENSE file for details.
+package org.openstreetmap.josm.gui.download;
+
+import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.awt.GridBagLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.FocusAdapter;
+import java.awt.event.FocusEvent;
+import java.io.IOException;
+import java.util.logging.Logger;
+
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.openstreetmap.josm.data.Bounds;
+import org.openstreetmap.josm.tools.GBC;
+import org.w3c.dom.Document;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.xml.sax.SAXException;
+/**
+ * ID Number Selector
+ * 
+ * Input method for the "Download from OSM" dialog box.  Given an OSM element ID number,
+ * it finds the center point and loads small additional area on each side.
+ * Very handy if you've found a problem element in an XML or database dump.
+ * 
+ * Example: enter node id 1, to see the first node ever added to OSM
+ * TODO: support ways/relations
+ *
+ * @author Bryce Nesbitt, April 2011
+ *
+ */
+public class IdNumberSelection implements DownloadSelection {
+	private static final Logger logger = Logger.getLogger(IdNumberSelection.class.getName());
+
+    private DownloadDialog parent;
+    private JTextField osmid = new JTextField(11);
+    private int lastid = 0;
+
+    public void addGui(final DownloadDialog gui) {
+    	BoundingBoxBuilder bboxbuilder = new BoundingBoxBuilder();
+    	osmid.addFocusListener (bboxbuilder);
+    	osmid.addActionListener(bboxbuilder);
+    	
+        final JPanel dlg = new JPanel(new GridBagLayout());
+        dlg.add(new JLabel(tr("OSM Node ID")), GBC.std().insets(10,20,5,0));
+        dlg.add(osmid, GBC.std().insets(0,20,0,0));
+        gui.addDownloadAreaSelector(dlg, tr("Node ID"));
+        parent = gui;
+    }
+
+    public void setDownloadArea(Bounds area) {
+    }
+    
+    class BoundingBoxBuilder extends FocusAdapter implements ActionListener {
+ 
+    	protected void refreshBounds() {
+            double fudgelon=.001, fudgelat=.001;
+            double mylon=0,       mylat=0;
+            
+            // Extract the OSM element ID the user wants as the center point
+            int id;
+			try {
+				id = Integer.parseInt(osmid.getText().trim());
+			} catch (NumberFormatException e1) {
+	            Bounds b = new Bounds(0,0,0,0);
+	            parent.boundingBoxChanged(b, IdNumberSelection.this);
+	            return;
+			}
+            if( id == lastid ) {
+            	return;
+            }
+            lastid = id;            
+			
+			// Use the DOM to load an element from the API, and parse out the lat/lon.
+			String url = "http://api.openstreetmap.org/api/0.6/node/"+id;
+			try {
+				DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+				DocumentBuilder db = dbf.newDocumentBuilder();
+				logger.info(url);
+				Document doc = db.parse(url);				
+				Node         node = doc.getElementsByTagName("node").item(0);
+				NamedNodeMap nmap = node.getAttributes();
+				mylat = Double.parseDouble(nmap.getNamedItem("lat").getNodeValue());
+				mylon = Double.parseDouble(nmap.getNamedItem("lon").getNodeValue());					
+			} catch (ParserConfigurationException e) {
+				e.printStackTrace();
+			} catch (SAXException e) {
+				e.printStackTrace();
+			} catch (IOException e) {
+				mylat = mylon = 0;
+			}	
+						
+            Bounds b = new Bounds(mylat-fudgelon,mylon-fudgelat,mylat+fudgelon,mylon+fudgelat);
+            parent.boundingBoxChanged(b, IdNumberSelection.this);
+        }
+        public void focusLost(FocusEvent e) {
+            refreshBounds();
+        }
+        public void actionPerformed(ActionEvent e) {
+            refreshBounds();
+        }
+    }
+}
+