It is actually letting me import the form but is timing out now and won’t complete. I know the file is big but shouldn’t be an issue as I was doing it last week without any problems.
The Adobe Service that you are having an issue with is actually "FormsCentral" and not "Fill & Sign", this can be confusing to find the right forum.
FormsCentral is experiencing a service outage at this time and we're working very hard to recover. You can see an upate on the status in the announcement at the top of the FormsCentral Forums page here: http://forums.adobe.com/community/formscentral?view=discussions
I am also going to move this post to the FormsCentral forums...
We apologize for the impact on your work today.