Quick contact DB app?

[Alan Dayley]

I know I will get several possible solutions to this question, but that is 
what I am after and is the joy of Linux/open source/free software!

I want to use or create a contact database with the usual contact info but 
also contact records containing dates and times of last contact, comments on 
the contact, etc.  It must already exist somewhere or be easy to create with 
the right tool.  In my former life as a other OS app developer, I know 
exactly what tools I would use but I have not done this in Linux before.

Is there an app that does this sort of thing well?
Or
What tools would I use to build this app?  GNUe would probably be overkill 
but maybe it can scale really small.  Kylix might work if I could bring 
myself to use Pascal (gack!).

-General requirements: Single user, single workstation, Linux, KDE, nothing 
fancy, just a basic GUI and simple reporting capability perhaps.

Alan