The first time I clicked product info the text areas were both blank... I was confused, second time they had info.
I agree with the register for what purpose comment... make that more clear.
It seems like the whole page is developed with your tool... let the user know that somehow.
Totally nitpicking, but
There is no limit to the number of forms that you can create.
And then as has been said, you need a header, or since your tool might not support that... an intro page.
Last thing, I have a 1280*1024 screen going here, and I don't get to take advantage of that at all.... and then if I dial it down to 800*600, I have to scroll to fit it... maybe if you could let the page scale more.
All my opinions, I think it's great as a whole, but since you were asking for critiques, those're mine.
-Rob