I broke out the ${...} functionality into a separate plugin so that we can develop it further. I left a hook in jquery.js so that this can be done, plus I left in the function() functionality.

src/jquery/jquery.js

@@ -439,17 +439,15 @@ jQuery.fn = jQuery.prototype = {
 					for ( var prop in key )
 						jQuery.attr(
 							type ? this.style : this,
-							prop, jQuery.parseSetter(key[prop])
+							prop, jQuery.prop(this, prop, key[prop], type)
 						);
 
 				// See if we're setting a single key/value style
-				else {
-					// convert ${this.property} to function returnung that property
+				else
 					jQuery.attr(
 						type ? this.style : this,
-						key, jQuery.parseSetter(value)
+						key, jQuery.prop(this, key, value, type)
 					);
-				}
 			}) :
 
 			// Look for the case where we're accessing a style value
@@ -1233,6 +1231,12 @@ jQuery.extend({
 			for ( var i in obj )
 				fn.apply( obj[i], args || [i, obj[i]] );
 		else
+			for ( var i = 0, ol = obj.length; i < ol; i++ )
+				if ( fn.apply( obj[i], args || [i, obj[i]] ) === false ) break;
+		return obj;
+	},
+	
+	prop: function(elem, key, value){
 		// Handle executable functions
 		return value.constructor == Function &&
 			value.call( elem, val ) || value;
@@ -1399,16 +1403,6 @@ jQuery.extend({
 			else
 				r.push(	arg.nodeType ? arg : document.createTextNode(arg.toString()) );
 		}
-
-		return r;
-	},
-	
-	parseSetter: function(value) {
-		if( typeof value == "string" && value.charAt(0) == "$" ) {
-			var m = value.match(/{(.*)}$/);
-			if ( m && m[1] ) {
-				value = new Function( "return " + m[1] );
-			}
 
 		return r;
 	},
@@ -1424,11 +1418,6 @@ jQuery.extend({
 			value: "value",
 			disabled: "disabled",
 			checked: "checked",
-			readonly: "readOnly",
-			selected: "selected"
-		};
-		
-		// get value if a function is provided
 			readonly: "readOnly",
 			selected: "selected"
 		};