MarketPress installation extremely slow - please help

Hi guys

I have created an e-commerce store using MarketPress. Unfortunately the store is extremely slow and I am uncertain what is causing it to be so slow. Please visit http://www.locarnodriedfruit.co.za and experience it for yourselves.

Please help me speed it up. I need to deliver it to the client as soon as possible and something this slow is not worth delivering.

Thanks
Johann