You can find the current version in the command line interface:
$ python -m wand.version
0.3.9
$ python -m wand.version --verbose
Wand 0.3.9
ImageMagick 6.7.7-6 2012-06-03 Q16 http://www.imagemagick.org
New in version 0.2.0: The command line interface.
New in version 0.2.2: The --verbose/-v option which also prints ImageMagick library version for CLI.
(basestring) The version string e.g. '0.1.2'.
Changed in version 0.1.9: Becomes string. (It was tuple before.)
(tuple) The version tuple e.g. (0, 1, 2).
Changed in version 0.1.9: Becomes tuple. (It was string before.)