We promised to roll out new features this week, and we've delivered. You can now comment on any photo in either a guestofaguest image gallery or an individual's profile page. Right now all comments on photos are anonymous (in order to save commenter's from having to enter in a lot of information), but they will be moderated (so be nice!).
So if you see a fun party, or a dress you like, a guy or gal you fancy, something that inspires you to sound-off, and realize that the picture could use a few extra words of expression, now is your chance!