3 Things:
My biggest issue with the site is that you don't show the final product anywhere. It should really be the hero of your home page (where that little dude with the chalkboard is). Even if you don't have one printed yet, make a fake print+frame in Photoshop (not hard) and throw it on an istock living room image [1].
Second, your "Buy Now" button should be other places besides the top-right corner. Took me a while to find it. Look at our site or others that sell just 1 thing. You need a big CTA button middle-left. A/B Test it for sure.
Third, consider offering a frame as an add-on. I don't think you can walk in to Target and get a frame that fits an 8x36 print and most people won't go through the additional step of finding one or having it made. You want repeat customers and the best way to get them is to make sure they use/see the product the first time they buy. At the very least, tell them where they can find frames to fit your prints and put that on your site and email receipts.
That's all I got for now. Good job.
[1] http://www.istockphoto.com/search/text/blank%20living%20room...