If you want to get the iconv extension properly running with PHP 5 and fink on OS X, you need the following configure option
and then it should work.
Hope that helps others, too.
Yes, that helped a lot :)
Kind of confusing…
In the spirit of http://netevil.org/node.php?uuid=437ad06a-2e9a-3727-5160-37ad06a16aca, it sounds like you should open a bug to add this to config.m4 at http://bugs.php.net.
And probably file a second bug for the documentation to mention this for configuring on OSX.