For people like me, one of the few things keeping me from switching from MS Office to some open source office package is the lack of a tool similar to Access. Yes, I realize that MySQL and other open source databases are more powerful than Access, but I don't know them. Anyway, this project appears to be allow users of KOffice to manipulate data in ways similar to Acess. It is still only a few months old, but it looks promising!
http://www.kexi-project.org/about.html
http://www.kexi-project.org/about.html