FANTASTIC JOB !!! - This is what template customization is all about.
One bit of constructive criticism . .. the large grey block at the top really takes away from the rest of the site. In my humble opinion, the top of your site should be the green header with your logo. Perhaps you can put those top header links within that block somehow.
Overall, though . . . very impressive and inspirational job.
I was unsure of the grey bar at the top myself but my designer and the client loved it so it had to stay.
I was also going to change the colours of the cart elements but had to focus on getting the site working for the deadline, I had to remake the site in around 6 days so had to prioritise a few things, now the client has seen it he likes the blues and doesnt want me to change it.
I think the biggest reason it is so different from the normal magento template is that I had originally made the site on Joomla and had all the designs fully signed off. I then realised it didnt work quite as it should and had to start agian on a decent CMS but the client still wanted the same site so I had to chop up magento to fit.
Will have a brand new site up in a few weeks for you all to look at, hope its as well received