I've used mezzanine before but ultimately removed it from the code. If you're interested in adding a company blog to your app's domain, it just touches too many things and makes a mess. I use zinnia now
http://django-blog-zinnia.com/.
I think mezzanine is a great alternative to wordpress. It makes a great blog if that's all you want. If what you need is a CMS to handle the content side of your app, you may want something a little more flexible/light weight.
