I have asus rt-66u running tomato firmware. (The same problem occurs on the latest toastman and shibby builds)
It can connect to a lynksys e3000 in client ethernet bridge mode when encrypted using wpa2 and AES but can't in straight client mode.
However with NO encryption, the client mode works just fine.
On the various tomato forums, similar problems are occasionally reported but I have never seen a response other than a report that it does work for some other people.
I am posting this here in the hope that some Gentoo user may have a helpful comment or suggestion.
