This is kludgey, but I found the best answer may be to get into the game on the original computer and resign from the game. Then you can take over as a new player on the new machine.
Unfortunately, without access to my home computer I can't do that either. I guess the game will just have to languish for the next few days.
The thing that makes this so annoying is that I'm sure I remember the password. I just apparently don't remember exactly which letters I turned into numbers or punctuation marks. Or maybe I did something unusual when entering my user name?
Is there any way to glean user names from the saved games?