I would like the ability to have a field in a related table auto-populate based on a corresponding field in a parent feature class. Currently the only way this happens is if said field is used as the key field in the relationship class. Sometimes there are multiple fields' worth of values/text in the parent feature class that you desire to be included in the child table. Having to re-enter this information is time consuming and inefficient. In ArcPad this was easily done through a few lines of VBScript. After spending a couple hours on the phone with an extremely thorough ESRI tech, it was concluded that this cannot be done.