Hi there,
You've got a pretty good looking site there so far. I love the colors and the clean, uncluttered design. My suggestions are:
Left justify your text where ever it makes sense (that is nearly everywhere). Full sentences, paragraphs should probably be left justified. I would use the centered text sparingly and carefully.
jessica brings up some good points:
-It might be best to run your navigation horizontally across the top. It is pretty standard, but it is a convention that people are comfortable with.
-re: the splash page - I would think about how you can make this page more useful to the user. Think about other online merchants (amazon for instance). You could use it to show off a new/feature product, offer a bit of news, or give a quick overview of the company. Draw them in and get them shopping right away!
-I'm not wild about the handling of the about and contact pages. I would use graphics for your logo and then just do the text in Georgia or whatever (left-justified). It will be more readable and more professional.
-I'd put some kind of contact info on every page.
-My last one is just a thought for new content or whatever. I think you can get away with higher resolution images. A lot of effort is going into the settings in the photos. Let people have big, clear, beautiful images. The effect will be dramatic.
Okay that's my 2 cents. Take what you can use and don't worry about the rest. I think you are on the right track. Don't lose the clean style though!
I am not much of a lip balm guy (naturally moist, supple lips I guess

) but I wish you the best of luck with your business.