No, the FormsCentral desktop app that is part of Acrobat Pro XI allows you to create an unlimited of PDF forms without using the online FormsCentral service. If you want to allow your PDF form submissions to be managed in the cloud or use web forms you would need to subscribe separately for FormsCentral online service.
This FAQ will also explain the difference: http://forums.adobe.com/docs/DOC-1385
Thank you Randy. That was very helpful. I now feel comfortable with my purchase because I was afraid that I could have gotten both packages for $199 instead of spending $150 on the forms and another $150 for acrobat. I use the web based forms a lot so it definitely was a worthwhile purchase.