Is it worth it to give your personal information to Change.gov?

I just came across the Citizen's Briefing Book on Change.gov and was all ready to participate when it asked me for the following information in order to register:

• First Name
• Last Name
• Email
• Zip Code

Their privacy policy says that they track IP addresses and then has the following little ditty:

It is our general policy not to make Personal Information available to anyone other than our employees, staff, and agents.

Doesn't that mean the entire government of the United States? What's a citizen to do if you don't want to have your personal information known but you want your voice heard and your right to participate? Or, more simply put, is it worth it to give your personal information to Change.gov?