Hi! I'm sorry it has taken so long to get back with you. Overall, the Lab Organizer site design is clear and attractive, but there are some things that can be improved upon.
First, the hover button on the first page has decided not to load this time and I cannot get into your site (I will try to reload, but keep in mind, prospective customers most likely will not). You would be better off using a different form of navigation, such as a JavaScript rollover. FP hover buttons are terribly unpredictable. Sometimes they even crash browsers.
You are right about the first page. You may want to keep in mind that search engines will be looking for text on the index page. Also, along that line, I believe you need more of a company description for your site. Coming into the site cold, I have no idea who the company is, if they are reputable, how long they've been around, where they are located, etc.
You are aware that the home button is linked to the product page?
Did you anti-alias your logo? It looks just a bit jagged.
It appears the shopping cart is working. :-)
On the TrippNT site, the header font graphic looks blurry to me and the yellow, "Get Your Lab..." letters are running together. If your graphics program has a way to do it, that would look better with the letters spread apart a little.
I'm sorry, but there's something that bugs the daylights out of me on that home page (haven't gotten further, yet)...all those sentence fragments...fingernails on the chalkboard! One occasionally for emphasis I can overlook, but so many is just a turn-off. I know we talk that way, and in very informal writing we do, but this is not informal. You are appealing to professional, educated people.
On the Product Index page, I see you're not finished, but I have a recommendation for the title graphic. It really needs to be made a transparent .gif. The background is obvious, and the .jpg format is causing a "glow" around the letters because it has been compressed too far. A good rule of thumb is to keep .jpg for photo-type graphics, and for those with lots of gradient attributes.
The click button is not clear as to where you are going when you click.
I got to the Chemical Compatibility Table and lost all page navigation. It is best to keep the navigation consistent on all pages.
Hey...I just went to your order form and saw where the company is. I lived in Lee's Summit for a year and grew up in that area. Small world!
That reminds me...again, no company information up front...who you are, where you are, ditto the related comments about the first site. If I'm a customer and surfing around, looking at products and have a question, is there a phone number I can use to contact the company? I see it on some pages, but not all. Some kind of contact information should be on each page, consistently in the same place, an obvious e-mail address and/or phone number. Often that would accompany a textual navigation bar at the bottom of each page.
I am printing the order form and it gets cut off big-time. From previous online shopping experience (and surfing for research purposes) this is very annoying. You should either make that form a lot narrower, give instructions on how to print in landscape format, or provide a link to a printer-friendly form.
Be sure to add alternative text for all your graphics. You also need to take a look at your description meta tag. Basically, what you've got is another list of keywords. A description should be a sentence describing your business or site.
I do like the way you've put your products in colored cells to separate them.
Best of luck with your site.

Sandy
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www.alleghenyweb.com