ifuse 0.9.5 configure looks for libiphone 1.0

Here is what I have:

bgs ~ # ls -lsa /usr/local/lib/pkgconfig/libiphone-1.0.pc
4 -rw-r--r-- 1 root root 376 2009-12-22 22:49 /usr/local/lib/pkgconfig/libiphone-1.0.pc
bgs ~ # cat /usr/local/lib/pkgconfig/libiphone-1.0.pc
prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: libiphone
Description: A library to communicate with the Lockdown server on the iPhone
Version: 0.9.5
Requires: libplist >= 0.12 libusbmuxd >= 0.1.0 glib-2.0 >= 2.14.1 gthread-2.0 >= 2.14.1 gnutls >= 1.6.3 libtasn1 >= 1.1
Libs: -L${libdir} -liphone
Cflags: -I${includedir}

Well, I bet your pkg-config does not look (automatically) in /usr/local/lib/pkgconfig but /usr/lib/pkgconfig. This is the case e.g. with ubuntu.
So I suggest you go into your libiphone source tree and do the following:

$ sudo make uninstall
$ ./autogen.sh --prefix=/usr
$ make && sudo make install

Then you go into your ifuse source tree and try to reconfigure, perhaps you also want to use the same prefix:

$ ./autogen.sh --prefix=/usr
$ make && sudo make install

This should do it.