This is for Stinky Mouse (mmmm) and any others who think they don't have the ability to review a website. Often people like you are exactly what is needed to review a website before launch.
Does the front page make you want to click in further?
Are you confused when you first see the navigation and menu system or does your eye flow to the most important parts first?
Are things generally where you expect them to be?
Tell the developer whether the site loads quickly enough for your hardware configuration.
When you click on a link, is it what you expected to be on the next page, or not? If it's not, tell the owner what you thought you were going to see-- this is very important for the designer to be able to get a fresh view on how the navigation works.
Can you find your way around and then back to the start again? Are the search facilities appropriate for the site?
Imagine yourself as the site's target audience (whether it be children, lumberjacks, or cricket umpires) and tell the designer whether you think the colors and graphics are appropriate for the audience. Is the kids site colorful and lively or dull and grey? Is the tax advice site using too much flash and graphics that people wanting tax advice don't care about?
Anyway.. just a few thoughts on how you can review a few sites from an end user's perspective instead of a developer's.