I don't believe FormsCentral offers a URL shortening/customizing service. You could suggest it on the features suggestions form:
That said, I use the service: tinyurl.com to accomplish this. They let you set a custom URL... sort of.
The above URL for submitting suggestions can be shortened to:
Or it can be customized to:
Not exactly what you were looking for, but it's an interim step.
Hope that helps.