Hi yeh I agree with Aspkin your site is clean but needs to look a little more professional. Your selling dvds so I would suggest make the site look a little more dvd like.
Your using the classic template from zencart - Its nice but try and work on a little customising. I would recommend you use the zencart forum - excellent support on there.
I looked at your backlinks and looks like you only have about 21 - you will need to work on your backlinks somewhat more. Im not sure what key-phrases your optimising your site for however if its for something like dvd films then your competition is alot- around the 27,000,000 figure.
By looking at the number 1 slot in the uk for the key-phrase dvd films - I know your from the US but just giving an example- they have 154,238 backlinks- now thats alot. The good news is that its not the amount of backlinks but the quality of them- so try to get backlinks from high page rank sites and you should see yourself move up in the organic results.
As your using zencart I would suggest you also use the google/froogle plugin and create an account with google base. Also use the site map generator and ping it to yahoo- google and msn.
You can also add the google analytics info into your site and use it to find out where and how customers are finding your site and where they are leaving from. Its a good tool that all webmasters should have and become accustomed to
The writing on the front page of your site looks a little colorful and loud - try and reduce the size of the font and using fewer colors.
I would also suggest removing the search box in the sidebox as you already have one at the top. Move your specials sidebox towards the top and best sellers towards the bottom. Also you have no information on the conditions of use link.
You only have 3 products - I guess you havnt got round to adding your other lines. Add more products and create more pages for your customers to find you with. The way I see it is the more pages the more doorways to get into your site.
I work with zencart myself and personally one of the things that I always change is the width of the page. I change it to 950 so it gives a wider feel to the site. I would also change the standard zencart header. If you look around on the zencart forum or even do a search in google you will find many free templates and also have the option to buy one.
Zencart is great to work with and has some great plugins and mods to customise your store with and I would suggest looking through them. You will be able to get customised buttons and new sideboxes. Im not sure if you like the color green that is used on the template but they can all be changed. It might be a good idea to get adobe dreamweacer and use it to edit your css - html and php -
Anyway if you need a hand please feel free to ask - if I have time I will help if not then I will point you in the right direction. I know how hard it can be learning zencart and other carts.
cheers
Where else to advertise besides.... 
