Hi Stuart, I'm an ecommerce AdWords specialist (you'll find my book on Amazon, "The AdWords Bible for eCommerce"). Your post came up in Google Alerts.
Products dont get instantly approved and it may take several days for them to go live.
In your AdWords account, check Tools/Merchant Center to make sure your account is properly linked. Then click on that link to see if your products are approved or not.
You should also log in to your merchant center to see more detail on any issues.
If you're stuck you can contact me directly at david(at)rothwellmedia(dot)com.