Making your Profile 2.0 Private
With 2.0 there is no longer a single privacy on & off switch that affects the whole profile. (Your "My Account/Privacy"
setting no longer applies once you convert to 2.0). Instead, you need to set the privacy on a module by module basis.
The idea is you can show some things to the public, and other things to friends only.  Review the steps below to see
how to make a module (section) private from public view.
Step 1:  Click Edit Profile and then click Customize.
Step 2:  Lets say I want my comments section hidden from the public but viewable by
my friends only.

Scroll down to the module (section) and click the little pencil, like below.

Step 3:  After clicking the pencil the module will expand.  Click the Friends
Only to show only to them.  Then click Apply Changes.

Step 4:  Click Publish, then your done.