Is std::tr1::unordered_map supposed to be working yet?

[Paul C. Leopardi]

Hi,
Two related questions.

1. Is the difference in interface between __gnu_cxx::hash_map and 
std::tr1::unordered_map documented anywhere? Does the fact that I can't find 
any such gcc - specific documentation mean that std::tr1::unordered_map is a 
trivial drop-in replacement for __gnu_cxx::hash_map ?

2. I've been trying to use std::tr1::unordered_map as a replacement for 
__gnu_cxx::hash_map, with gcc version 4.0.2 20050728 (prerelease), and have 
encountered errors. Is this mailing list the correct place to check to see if 
I am using std::tr1::unordered_map correctly, and to check that it should 
work with gcc version 4.0.2 20050728 (prerelease)?

Thanks, Paul Leopardi