online calendar/address book tool that intergrades with evolution/kmail

[Gezim Hoxha]

Hi fellow Fedorians, 

I have a web server(apache), mail server (postfix), imap, and
squirrelmail all configured and running.

Squirrelmail is really good and I like it. In particular, I like the
fact that it has an address book and a calendar. However I'm looking for
a mail client that intergrades with squirrelmail address book and
calendar. If there is no such thing, then a tool to replace squirrelmail
would be good too. This tool (squirrelmail replacement) would have to
intergrade with evolution or korganizer (or some other package that has
mail, address book, and calendar support).

If anyone has any idea(s), I'd be grateful.
Note: None free (as in money) solutions might be okay too.

Thanks,
-Gezim