This looks promising. A lot of people post "Review my startup" threads here and most look pretty half-assed. This does not. In fact, it looks like you've put a lot of effort into making your startup look very professional.
I don't have a lot to critique about the actual business, but hopefully I can give you some constructive criticism.
On the pricing/signup page I noticed that the background image you're using for the pricing table is gigantic -- 122kb (http://static.ma.rs/application_assets/site/images/prices_bg... 122kb). I'm on a fairly fast connection here (16mbits/down) and it took a noticeable amount of time to load. I'm assuming that it's a 24bit png, but since you're using a white background behind it you won't need the alpha layer and it seems like (based on the colors used in the image) that you could get away with an 8bit png and have it look just fine.
Also on the pricing page, "limited" and "full" don't tell me much about what I'll be getting. Maybe have the ability to mouse over that text and get a little description of what you mean?
I'll append any additional thoughts to this comment as I check it out, but so far you have a really great looking startup on your hands. Not to mention a kick ass domain name -- good score.