Becky I feel for you. Currently I am not riding either, (I have been flat on my with a severely sprained ankle due to falling down some steps about 3 weeks ago). However I at least can stare longingly at my bike and dream of riding, you cannot even do that!

Just a thought and I should preface this by saying I am only wildly guessing here: Does anyone else think that the problem may not lay with the wheel but the frame? Specifically can a crack in the chain-stays, seat-stays, or dropouts put an unusual strain on the wheel possibly be the cause of all this grief?