Index: sqlalchemy/sql.py
===================================================================
--- sqlalchemy/sql.py	(revision 1753)
+++ sqlalchemy/sql.py	(working copy)
@@ -1332,6 +1332,7 @@
         self.parens = kwargs.pop('parens', False)
         self.correlate = kwargs.pop('correlate', False)
         self.for_update = kwargs.pop('for_update', False)
+        self.nowait = kwargs.pop('nowait', False)
         for s in self.selects:
             s.group_by(None)
             s.order_by(None)
@@ -1381,7 +1382,7 @@
 class Select(SelectBaseMixin, FromClause):
     """represents a SELECT statement, with appendable clauses, as well as 
     the ability to execute itself and return a result set."""
-    def __init__(self, columns=None, whereclause = None, from_obj = [], order_by = None, group_by=None, having=None, use_labels = False, distinct=False, for_update=False, engine=None, limit=None, offset=None, scalar=False, correlate=True):
+    def __init__(self, columns=None, whereclause = None, from_obj = [], order_by = None, group_by=None, having=None, use_labels = False, distinct=False, for_update=False, nowait=False, engine=None, limit=None, offset=None, scalar=False, correlate=True):
         SelectBaseMixin.__init__(self)
         self._froms = util.OrderedDict()
         self.use_labels = use_labels
@@ -1391,6 +1392,7 @@
         self.limit = limit
         self.offset = offset
         self.for_update = for_update
+        self.nowait = nowait
 
         # indicates that this select statement should not expand its columns
         # into the column clause of an enclosing select, and should instead
Index: sqlalchemy/ansisql.py
===================================================================
--- sqlalchemy/ansisql.py	(revision 1753)
+++ sqlalchemy/ansisql.py	(working copy)
@@ -400,6 +400,9 @@
  
         if select.for_update:
             text += " FOR UPDATE"
+
+        if select.nowait:
+            text += " NOWAIT"
             
         if getattr(select, 'parens', False):
             self.strings[select] = "(" + text + ")"