Version information does not differ from that above. There are binaries available from http://www.imagemagick.org/ so that you can load this extension on Windows without need for a compiler.
PHP >= 5.1.3 and ImageMagick >= 6.2.4 is required. The amount of formats supported is by Imagick is entirely dependent upon the amount of formats supported by your ImageMagick installation. For example, Imagemagick requires ghostscript to conduct PDF operations.