Are there any good C++ Mock object frameworks?

Does anyone have any experience with Mock Object frameworks in C++? I haven't been able to find much. It appears Google will be open sourcing theirs soon, so I guess it may be best to wait for that, but still interested to hear of others.

Just an update the Google's gMock has been out for a while now.

From stackoverflow Chris Mayer

• Check out mockpp, it should be familiar if you've used mock objects before.

  From conmulligan

• I use AMOP in conjunction with UnitTest++.

  From graham.reeds

• gMock is awesome. (I thought it was already released! :-( )

  From 0124816

• We just release it: http://code.google.com/p/googlemock/

  From $pageUsers[$post.author].name

• I've written Hippo Mocks ( www.assembla.com/spaces/hippomocks ) which should work quite well. It's been released a while back and will very soon get an update (the tip of the archive already contains the relevant fixes).

  From $pageUsers[$post.author].name