applied the patch from andieluijk to fix #2 (simplejson import error)

campaign/admin.py

@@ -10,7 +10,10 @@
 from django.utils.translation import ugettext as _
 from django.utils.encoding import force_unicode
 from django.utils.safestring import mark_safe
-from django.utils.simplejson import simplejson as json
+try:
+    from django.utils.simplejson import simplejson as json
+except ImportError:
+    from django.utils import simplejson as json
 
 from campaign.models import MailTemplate, Subscriber, Campaign, BlacklistEntry, BounceEntry, SubscriberList
 from campaign.forms import UploadForm

campaign/forms.py

@@ -1,8 +1,11 @@
 import csv
 from django import forms
-from django.utils.simplejson import simplejson as json
 from django.utils.translation import ugettext as _
-
+try:
+    from django.utils.simplejson import simplejson as json
+except ImportError:
+    from django.utils import simplejson as json
+
 class UploadForm(forms.Form):
     """
     validates that the uploaded file contains parseable json data.