Calendar view improvements
Please could all day events not "fill up" the whole day? I often need to record something like my kids' school holidays, but I still need to have appointments for specific activities during the day. I use Touchdown on my Android phone and its calendar display is much better (but the iOS version is terrible, which is why I use Boxer on my iPad).
And please support Exchange categories with colour coding: it's really useful to be able to see at a glance which appointments are meetings, personal, medical, etc.