Index: newforms/forms.py
===================================================================
--- newforms/forms.py	(revision 6992)
+++ newforms/forms.py	(working copy)
@@ -11,7 +11,7 @@
 
 from fields import Field
 from widgets import TextInput, Textarea
-from util import flatatt, ErrorDict, ErrorList, ValidationError
+from util import flatatt, WarningDict, WarningList, ErrorDict, ErrorList, ValidationError
 
 __all__ = ('BaseForm', 'Form')
 
@@ -87,6 +87,13 @@
         return self._errors
     errors = property(_get_errors)
 
+    def _get_warnings(self):
+        "Returns an WarningsDict for the data provided for the form"
+        if self._warnings is None:
+            self.full_clean()
+        return self._warnings
+    warnings = property(_get_warnings)
+
     def is_valid(self):
         """
         Returns True if the form has no errors. Otherwise, False. If errors are
@@ -173,6 +180,7 @@
         self.cleaned_data.
         """
         self._errors = ErrorDict()
+        self._warnings = ErrorDict()
         if not self.is_bound: # Stop further processing.
             return
         self.cleaned_data = {}
@@ -191,6 +199,7 @@
                 self._errors[name] = e.messages
                 if name in self.cleaned_data:
                     del self.cleaned_data[name]
+            self._warnings[name] = getattr(field, warnings, [])
         try:
             self.cleaned_data = self.clean()
         except ValidationError, e:
Index: newforms/util.py
===================================================================
--- newforms/util.py	(revision 6992)
+++ newforms/util.py	(working copy)
@@ -49,6 +49,27 @@
     def __repr__(self):
         return repr([force_unicode(e) for e in self])
 
+class WarningDict(ErrorDict):
+    """
+    A collection of warnings that knows how to display itself in various formats.
+
+    The dictionary keys are the field names, and the values are the warnings.
+    """
+    def as_ul(self):
+        if not self: return u''
+        return mark_safe(u'<ul class="warninglist">%s</ul>'
+                % ''.join([u'<li>%s%s</li>' % (k, force_unicode(v))
+                    for k, v in self.items()]))
+
+class WarningList(ErrorList):
+    """
+    A collection of warnings that knows how to display itself in various formats.
+    """
+    def as_ul(self):
+        if not self: return u''
+        return mark_safe(u'<ul class="warninglist">%s</ul>'
+                % ''.join([u'<li>%s</li>' % force_unicode(e) for e in self]))
+
 class ValidationError(Exception):
     def __init__(self, message):
         """