I think you should be able to search users. Then you wouldn't have to find a game made by them or a forum post by them to get to their profile page. This would make finding people you haven't friended yet easier.
For instance I can't find my friend's profile because he doesn't post and doesn't make games. Making him effectively invisible.
If you know your friend's username, you can type http://armorgames.com/user/ into your browser address, then type the username right after it, like: http://armorgames.com/user/cormyn
I'll make sure the webdev team are made aware of this feature request, but if you have other suggestions, please use the 'Contact' link on the menu bar to let us know!