3) Click on someone's name in the forums or on a different persons friends list and that will take you to their profile. You can also click on their name if they leave a comment.
In AG3 none of those will matter due to there being a new and improved search bar that searches for users and games accurately. Example: You type in "Matrix" then all the users and games that have "Matrix" in the name show up. It's wonderful. Click here for more information on AG3. I suggest reading all the stickies for general information and the ideas.