Allow typeahead for custom classes in the declarations section. If Microsoft can put it in Visual Studio 2003... I'm sure it's only a couple of more years away for Lotus to figure it out.
I don't think there's much to add to this. How hard can it be to sort this?
When viewing the Objects list for a form in designer, instead of just fieldname (Field), tell me what kind of field "(Field)" is.
e.g. (Field - Text)