For posterity, here's a list of currently failing tests in py3k.

BROKEN

+////////////////////////////////////////////////////////////////////////
+test_class
+////////////////////////////////////////////////////////////////////////
+
+test test_class failed -- hash(C1()) should raise <class 'exceptions.TypeError'>
+Also hash(C2())
+Also stack blowout, recursing between
+#5921 0x0003868c in slot_tp_call (self=0x5b0c90, args=0x338030, kwds=0x0) at ../Objects/typeobject.c:4583
+#5922 0x00021124 in PyObject_Call (func=0x5b0c90, arg=0x3384c0, kw=0x134e10) at ../Objects/abstract.c:1791
+
+////////////////////////////////////////////////////////////////////////
+test_minidom
+////////////////////////////////////////////////////////////////////////
+
+test test_minidom crashed -- <class 'exceptions.TypeError'>: Error when calling the metaclass bases
+    Cannot create a consistent method resolution
+order (MRO) for bases object, GetattrMagic
+
+////////////////////////////////////////////////////////////////////////
+test_xml_etree
+////////////////////////////////////////////////////////////////////////
+
+3 items had failures:
+  18 of  32 in test.test_xml_etree.find
+   1 of   3 in test.test_xml_etree.sanity
+   8 of  12 in test.test_xml_etree.xinclude
+***Test Failed*** 27 failures.
+test test_xml_etree failed -- 27 of 91 doctests failed
+
+////////////////////////////////////////////////////////////////////////
+test_xml_etree_c
+////////////////////////////////////////////////////////////////////////
+
+**********************************************************************
+File "/Users/guido/projects/python/py3k/Lib/test/test_xml_etree_c.py", line 112, in test.test_xml_etree_c.find
+Failed example:
+    elem.find("section/tag").tag
+Exception raised:
+    Traceback (most recent call last):
+      File "/Users/guido/projects/python/py3k/Lib/doctest.py", line 1207, in __run
+        compileflags, 1) in test.globs
+      File "<doctest test.test_xml_etree_c.find[3]>", line 1, in <module>
+        elem.find("section/tag").tag
+    AttributeError: 'NoneType' object has no attribute 'tag'
+
+////////////////////////////////////////////////////////////////////////
+test_descr
+////////////////////////////////////////////////////////////////////////
+
+Testing hash of mutable subclasses...
+Traceback (most recent call last):
+  File "../Lib/test/test_descr.py", line 4096, in <module>
+    test_main()
+  File "../Lib/test/test_descr.py", line 4059, in test_main
+    hashinherit()
+  File "../Lib/test/test_descr.py", line 3108, in hashinherit
+    raise TestFailed, "hash() of dict subclass should fail"
+test.test_support.TestFailed: hash() of dict subclass should fail
+
+////////////////////////////////////////////////////////////////////////
+test_gc
+////////////////////////////////////////////////////////////////////////
+
+testing finalizers... restoring automatic collection
+Traceback (most recent call last):
+  File "../Lib/test/test_gc.py", line 636, in <module>
+    test()
+  File "../Lib/test/test_gc.py", line 623, in test
+    test_all()
+  File "../Lib/test/test_gc.py", line 586, in test_all
+    run_test("finalizers", test_finalizer)
+  File "../Lib/test/test_gc.py", line 18, in run_test
+    thunk()
+  File "../Lib/test/test_gc.py", line 125, in test_finalizer
+    raise TestFailed, "didn't find obj in garbage (finalizer)"
+test.test_support.TestFailed: didn't find obj in garbage (finalizer)
+
+////////////////////////////////////////////////////////////////////////
+test_set
+////////////////////////////////////////////////////////////////////////
+
+======================================================================
+FAIL: test_contains (__main__.TestSetSubclass)
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "../Lib/test/test_set.py", line 52, in test_contains
+    self.assert_(self.thetype(self.letters) in s)
+AssertionError
+
+======================================================================
+FAIL: test_discard (__main__.TestSetSubclass)
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "../Lib/test/test_set.py", line 302, in test_discard
+    self.assert_(self.thetype(self.word) in s)
+AssertionError
+
+======================================================================
+FAIL: test_hash (__main__.TestSetSubclass)
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "../Lib/test/test_set.py", line 265, in test_hash
+    self.assertRaises(TypeError, hash, self.s)
+AssertionError: TypeError not raised
+
+======================================================================
+FAIL: test_remove (__main__.TestSetSubclass)
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "../Lib/test/test_set.py", line 291, in test_remove
+    self.assert_(self.thetype(self.word) in s)
+AssertionError