Fixed a typo in the setup.py and wrapped the other django import in __init__.py so you could call get_version without having django installed. Also increased the version number to 0.2.1

categories/__init__.py

@@ -1,11 +1,7 @@
-import fields
-
-from django.db.models import FieldDoesNotExist
-
 __version_info__ = {
     'major': 0,
     'minor': 2,
-    'micro': 0,
+    'micro': 1,
     'releaselevel': 'final',
     'serial': 0
 }
@@ -21,27 +17,34 @@ def get_version():
 
 __version__ = get_version()
 
-class AlreadyRegistered(Exception):
-    """
-    An attempt was made to register a model more than once.
-    """
-    pass
+try:
+    import fields
 
-registry = {}
+    from django.db.models import FieldDoesNotExist
 
-def register_m2m(model, field_name='categories', extra_params={}):
-    return _register(model, field_name, extra_params, fields.CategoryM2MField)
+    class AlreadyRegistered(Exception):
+        """
+        An attempt was made to register a model more than once.
+        """
+        pass
+
+    registry = {}
+
+    def register_m2m(model, field_name='categories', extra_params={}):
+        return _register(model, field_name, extra_params, fields.CategoryM2MField)
     
-def register_fk(model, field_name='category', extra_params={}):
-    return _register(model, field_name, extra_params, fields.CategoryFKField)
+    def register_fk(model, field_name='category', extra_params={}):
+        return _register(model, field_name, extra_params, fields.CategoryFKField)
     
-def _register(model, field_name, extra_params={}, field=fields.CategoryFKField):
-    registry_name = "%s.%s" % (model.__name__, field_name)
-    if registry_name in registry:
-        raise AlreadyRegistered
-    registry[registry_name] = model
-    opts = model._meta
-    try:
-        opts.get_field(field_name)
-    except FieldDoesNotExist:
-        field(**extra_params).contribute_to_class(model, field_name)
+    def _register(model, field_name, extra_params={}, field=fields.CategoryFKField):
+        registry_name = "%s.%s" % (model.__name__, field_name)
+        if registry_name in registry:
+            raise AlreadyRegistered
+        registry[registry_name] = model
+        opts = model._meta
+        try:
+            opts.get_field(field_name)
+        except FieldDoesNotExist:
+            field(**extra_params).contribute_to_class(model, field_name)
+except ImportError:
+    pass

setup.py

@@ -7,7 +7,7 @@ except IOError:
     long_description = ''
 
 setup(name='django-categories',
-      version=catgories.get_version(),
+      version=categories.get_version(),
       description='A way to handle one or more hierarchical category trees in django.',
       long_description=long_description,
       author='Corey Oordt',