Hi Susanna,
I know this post is kind of old, from 2004, but I wanted to let you know about something I just saw at the pharmacy. I have a Walgreens pharmacy store by my house and noticed that they have a new feature. You can add a flavor to your child's prescription for a small fee. I know Augmentin comes in suspension formula and thought you might be able to add a nice flavor to it so he can stomach the horrible stuff.
Just a thought, you might have already discovered this but I thought I might mention it anyways. Good luck with the kiddo!
Damaris