diff -uN --recursive pyasn1-0.0.9a/pyasn1/v1/codec/ber/decoder.py pyasn1-0.0.9a.any/pyasn1/v1/codec/ber/decoder.py
--- pyasn1-0.0.9a/pyasn1/v1/codec/ber/decoder.py	2008-11-23 06:45:14.000000000 -0500
+++ pyasn1-0.0.9a.any/pyasn1/v1/codec/ber/decoder.py	2009-11-16 15:36:38.000000000 -0500
@@ -312,6 +312,29 @@
 class UTCTimeDecoder(OctetStringDecoder):
     protoComponent = useful.UTCTime()
 
+class AnyDecoder(ChoiceDecoder):
+    protoComponent = univ.Any
+    def __init__(self, header):
+        self.__header = header
+    def _createComponent(self, tagSet, asn1Spec):
+        if asn1Spec is None:
+            return self.protoComponent(tagSet=tagSet)
+        else:
+            return asn1Spec.clone()
+    def valueDecoder(self, substrate, asn1Spec, tagSet,
+                     length, state, decodeFun):
+        if not decodeFun:
+            return r, substrate
+        component, new_substrate = decodeFun(
+            substrate, None, tagSet, length, state
+            )
+        assert substrate.endswith(new_substrate)
+        if new_substrate:
+            substrate = substrate[:-len(new_substrate)]
+        return univ.Any(self.__header+substrate), new_substrate
+
+    indefLenValueDecoder = valueDecoder
+
 codecMap = {
     eoo.endOfOctets.tagSet: EndOfOctetsDecoder(),
     univ.Integer.tagSet: IntegerDecoder(),
@@ -352,6 +375,7 @@
         # Decode tag & length
         while state != stStop:
             if state == stDecodeTag:
+                substrate_full = substrate
                 # Decode tag
                 if not substrate:
                     raise error.SubstrateUnderrunError(
@@ -415,6 +439,7 @@
                     raise error.SubstrateUnderrunError(
                         '%d-octet short' % (length - len(substrate))
                         )
+                substrate_header = substrate_full[:-len(substrate) or None]
             if state == stGetValueDecoder:
                 if asn1Spec is None:
                     state = stGetValueDecoderByTag
@@ -457,7 +482,12 @@
                     __chosenSpec = asn1Spec
                 else:
                     __chosenSpec = None
-                if __chosenSpec is None or not\
+                if __chosenSpec is None and isinstance(asn1Spec, dict) and \
+                        isinstance(asn1Spec.get(univ.Any.tagSet), univ.Any):
+                    concreteDecoder = AnyDecoder(substrate_header)
+                    asn1Spec = None
+                    state = stDecodeValue
+                elif __chosenSpec is None or not\
                        __chosenSpec.getTypeMap().has_key(tagSet):
                     state = stTryAsExplicitTag
                 else:
Binary files pyasn1-0.0.9a/pyasn1/v1/codec/ber/.decoder.py.swp and pyasn1-0.0.9a.any/pyasn1/v1/codec/ber/.decoder.py.swp differ
diff -uN --recursive pyasn1-0.0.9a/pyasn1/v1/codec/ber/encoder.py pyasn1-0.0.9a.any/pyasn1/v1/codec/ber/encoder.py
--- pyasn1-0.0.9a/pyasn1/v1/codec/ber/encoder.py	2008-05-17 05:59:56.000000000 -0400
+++ pyasn1-0.0.9a.any/pyasn1/v1/codec/ber/encoder.py	2009-11-16 15:36:38.000000000 -0500
@@ -194,6 +194,16 @@
                 ) + substrate
         return substrate, 1
 
+class AnyEncoder(AbstractItemEncoder):
+    def _encodeTag(self, t, isConstructed):
+        if isConstructed:
+            return chr(t[0]|t[1]|t[2]|tag.tagFormatConstructed)
+        else:
+            return chr(t[0]|t[1]|t[2])
+    def _encodeValue(self, encodeFun, value, defMode, maxChunkSize):
+        assert len(value._value) <= maxChunkSize
+        return str(value._value), 0
+
 codecMap = {
     eoo.endOfOctets.tagSet: EndOfOctetsEncoder(),
     univ.Boolean.tagSet: IntegerEncoder(),
@@ -234,7 +244,10 @@
         if len(tagSet) > 1:
             concreteEncoder = explicitlyTaggedItemEncoder
         else:
-            concreteEncoder = self.__codecMap.get(tagSet)
+            if isinstance(value, univ.Any):
+                concreteEncoder = AnyEncoder()
+            else:
+                concreteEncoder = self.__codecMap.get(tagSet)
             if not concreteEncoder:
                 # XXX
                 baseTagSet = tagSet.getBaseTag()
diff -uN --recursive pyasn1-0.0.9a/pyasn1/v1/type/univ.py pyasn1-0.0.9a.any/pyasn1/v1/type/univ.py
--- pyasn1-0.0.9a/pyasn1/v1/type/univ.py	2008-11-23 06:45:35.000000000 -0500
+++ pyasn1-0.0.9a.any/pyasn1/v1/type/univ.py	2009-11-16 15:36:38.000000000 -0500
@@ -629,5 +629,10 @@
 
     def setDefaultComponents(self): pass
 
+class Any(base.AbstractSimpleAsn1Item):
+    tagSet = tag.TagSet()  # untagged, XXX as in Choice
+    defaultValue = ''
+    def prettyOut(self, value): return repr(value)
+
 # XXX
 # coercion rules?