Many of you are past the feeding/sleeping/pooping tracking phase, but for this sort of thing I found an app yesterday that works pretty well: ibaby log. You could manipulate the data better with excel, but this interface has really easy one touch start/stop features and creates simple graphs to collate the info. I wish I'd found it sooner!
ETA: sleep machine lite is a free white noise app that I like. The biggest drawback is that you can't do anything else with the phone while it's running. Can you tell that am enjoying my Christmas present?
Re: Baby logging app