Yes, its possible, and its also been done, very occasionally. However, one generally needs to prove that its worth the gods time, by sticking around long enough (ie show that you will not take over the username, and then procede to make it useless again). Which will mean taking another username, to start with.

The best way to start would probably be to /msg the gods wwith your petition (who you want to be and why). (Which also requires that you have a username..

C.