If you want to just test yourself, you get quite a lot of info from openssl's s_servers's status-page, enabled with -www:

    openssl req -x509 -nodes -days 30 -newkey rsa:2048 -keyout localhost.key -out localhost.crt
    openssl s_server -www -debug -accept 4433 -key localhost.key -cert localhost.crt

Then open https://localhost:4433 in your browser and temporarily ignore the cert-warning.

You'll get a list of ciphers supported by the server, and a list of ciphers common between the server and the client (which, with all ciphers enabled (default) on the server -- should be rather exhaustive).

See also: http://support.microsoft.com/kb/299520