Index: ui.slider.js
===================================================================
--- ui.slider.js	(revision 3093)
+++ ui.slider.js	(working copy)
@@ -99,7 +99,7 @@
 			});
 
 		this.handles.each(function(i) {
-			$(this).data("index.ui-slider-handle", i);
+			$(this).data("index.ui-slider-handle", i).attr("aria-valuenow", o.values ? o.values[i] : o.value); 
 		});
 
 		this.handles.keydown(function(event) {
@@ -170,6 +170,12 @@
 
 		});
 
+		var ariaDefaults = {role: 'slider',
+         "aria-valuemin": this.options.min, 
+         "aria-valuemax": this.options.max
+        };
+        this.handles.attr(ariaDefaults);   
+		
 		this._refreshValue();
 
 	},
@@ -353,6 +359,7 @@
 				var otherVal = this.values(index ? 0 : 1);
 				if (allowed !== false) {
 					this.values(index, newVal, ( event.type == 'mousedown' && this.options.animate ), true);
+					$(handle).attr("aria-valuenow",newVal);
 				}
 			}
 
@@ -366,6 +373,7 @@
 				});
 				if (allowed !== false) {
 					this._setData('value', newVal, ( event.type == 'mousedown' && this.options.animate ));
+					$(handle).attr("aria-valuenow",newVal);
 				}
 					
 			}