Christian Stocker has a quick new post with a solution for those Mac users out there that would like to use the iconv extension with fink.
--with-iconv=/sw/
and then it should work.
Hope that helps others, too.
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, apparently, it does - given the one comment below it so far that has a positive response...