Yes.  There are currently 3 different options for the visibility of your personal profile. 

1. Public - Any Giveness user can view your profile.

2. Friends Only - The people that you accept as friends are the only ones that can view your profile.

3. Anonymous - No one except yourself, when you are authenticated, can see your profile.

You can adjust this setting on your Manage Profile page which is located here:

http://www.giveness.com/member/admin/EditProfile.aspx

You will see 2 seperate checkboxes where you can set these values for your Profile.  Unchecking all boxes will make your profile public.