I've been interested in increasing my bust size for the longest time, but to no avail. I'm currently 18 as a 34 B or 34 C, depending on who manufactured the bra. I have a "scooping" breast shape, and it makes it kinda difficult to fill out most of my bras.
A while back, I tried breast enhancing pills, and they didn't do much whatsoever, and now I have started taking herbs for a bit. While I have seen a SLIGHT improvement, I still don't feel like I'm getting much from them ;(