Thanks, Uke4life, that's appreciated.
Ideally, when being uke for a newcomer like myself, you don't want to throw extra variables into the mix by resisting too early in learning the technique. With an inexperienced uke, though, that's not always possible - they resist too much, or they turn into a jellyfish. Or, they'll do something you simply don't expect - My own big mistake is forgetting which leg to fold when going over backwards - I just go with it now, but the first few times, I'd wind up just standing there saying 'er.....left foot or right?"
Properly performing the technique should insure successful resolution regardless of what uke's doing at the time; 90 per cent of ukemi is, I think, for the protection of uke, not for the success of nage's technique.