Hi,
I haven't really read over what everyone else has said, so please ignore things if I am repeating what has already been said.
Navigation - The rollover colour is too similar to the background colour of the menu bar, make this a bit darker and it will be much better, or me personally I would have the rollover as a background color, but that is just a personal preference.
Links to the products - The link needs some kind of rollover.
The flash banner at the top, I don't like at all, but saying that, I am not a flash fan at all. I feel you could use flash here, but would need to make it more visual appealing, to grab my attention to the products.
I think this is enough to get started
