I've just uploaded RMagick 1.13.0 to RubyForge. Here's a summary of the 
changes:

o Installable with RubyGems 0.9.0

o Added Image#auto_orient and Image#auto_orient!. This method uses the EXIF
  orientation tag to automatically orient an image (suggestion from John 
Oordopjes)

o Added Image#transform and #transverse, and their in-place equivalents.

o Added Image#adaptive_sharpen and #adaptive_sharpen_channel

o Added Image#radial_blur_channel

o Fixed bug #4806, add Pixel#hash and #eql? methods (bug report from
  Tim Pease)

o Fixed bug #4821, correct the documentation for Image#rotate (bug report
  from Tim Pease)

o Many other documentation fixes and updates

If you plan on installing this version with RubyGems please read the 
Release Notes (http://rubyforge.org/frs/shownotes.php?release_id=5815) 
before installing this release.

If you're using a web hosting service and it has a very old version of 
RMagick installed, please consider asking your service provider to 
upgrade. I've fixed several memory leaks in recent releases so if you're 
running into memory usage problems with your web app upgrading could 
really pay off.

RMagick is available as always from RubyForge: 
http://rubyforge.org/projects/rmagick/.

RMagick is an interface to the ImageMagick (www.imagemagick.org) and 
GraphicsMagick (www.graphicsmagick.org) image processing libraries. 
RMagick supports more than 90 image formats, including GIF, JPEG, PNG. 
It includes RVG, a 2D drawing API. RMagick comes with comprehensive HTML 
documentation.