If anyone does create an expanded data collection system, I hope they pass it on to the rest of us!
As a non-programmer just looking for a program that fits my needs, it would be great to have this feature available. Especially if it were easily configurable -- maybe an admin page where I could check which items I wanted to appear on the login page (name, addy, phone, etc.) and which would be optional, which required.
That would add a tremendous amount of flexibility & make it usable for a broader range of uses, too!
So if anyone's done this already, please let the rest of us know!