The colors are brilliant, and the lines are smooth. The creator of the images made a real point of using an anti-alias filter to get that effect. Well-done images just sing out. They really make a page a step above all others. If you do not know how to create images like this, either buy a book that will help or find someone who can do it for you.
Bad images suck the life right out of a page.
Keep it simple, stupid. Another reason this page grabbed my attention is that it follows the KISS principle. Obviously, this designer has great ability. The table format that allows the one block to stand out, the use of color, the images, all point to knowledge of the craft. But he didn't go overboard.