Installing id3lib-ruby on OS X Snow Leopard

I've got a rather large MP3 library, and it has started to become cluttered and unorganized. I decided to create a Ruby script that utilizes the id3lib-ruby gem. There are a few other options out there, but id3lib-ruby is a wrapper for the C library id3lib. It is pretty much full featured, allowing me to embed an album cover image directly in the MP3. I did have some trouble getting it installed however. Here is what I had to do to get it installed:

dwestendorf$ sudo port install id3lib
--->  Computing dependencies for id3lib
--->  Fetching gperf
--->  Attempting to fetch gperf-3.0.4.tar.gz from http://distfiles.macports.org/gperf
--->  Verifying checksum(s) for gperf
--->  Extracting gperf
--->  Configuring gperf
--->  Building gperf
--->  Staging gperf into destroot
--->  Installing gperf @3.0.4_0
--->  Activating gperf @3.0.4_0
--->  Cleaning gperf
--->  Fetching libiconv
--->  Attempting to fetch libiconv-1.13.tar.gz from http://mirrors.kernel.org/gnu/libiconv
--->  Verifying checksum(s) for libiconv
--->  Extracting libiconv
--->  Applying patches to libiconv
--->  Configuring libiconv
--->  Building libiconv
--->  Staging libiconv into destroot
--->  Installing libiconv @1.13_0
--->  Activating libiconv @1.13_0
--->  Cleaning libiconv
--->  Fetching zlib
--->  Attempting to fetch zlib-1.2.3.tar.bz2 from http://www.zlib.net/
--->  Verifying checksum(s) for zlib
--->  Extracting zlib
--->  Applying patches to zlib
--->  Configuring zlib
--->  Building zlib
--->  Staging zlib into destroot
--->  Installing zlib @1.2.3_3
--->  Activating zlib @1.2.3_3
--->  Cleaning zlib
--->  Fetching id3lib
--->  Attempting to fetch id3lib-3.8.3.tar.gz from http://voxel.dl.sourceforge.net/id3lib
--->  Verifying checksum(s) for id3lib
--->  Extracting id3lib
--->  Applying patches to id3lib
--->  Configuring id3lib
--->  Building id3lib
--->  Staging id3lib into destroot
--->  Installing id3lib @3.8.3_1
--->  Activating id3lib @3.8.3_1
--->  Cleaning id3lib

dwestendorf$ sudo env ARCHFLAGS="-arch x86_64" gem install id3lib-ruby -- --with-opt-dir=/opt/local
Building native extensions.  This could take a while...
Successfully installed id3lib-ruby-0.5.0
1 gem installed
Installing ri documentation for id3lib-ruby-0.5.0...
Installing RDoc documentation for id3lib-ruby-0.5.0...

dwestendorf$ irb
>> require 'id3lib'
=> true

Success!