Great pics! Your shots are beautifully composed and lighted, with the area of interest nicely defined.
I just saw an interesting article about a technique called "focus bracketing" for close up pics. It's probably more useful for illustration type shots than general interest shots, but I'm going to give it a try, with the help of a photoshop guru.
The idea is that you compose a shot with the closest part of the subject in focus and take a shot, then adjust the focus down so that the far edge of the depth of field of the first shot is in focus, rinse, repeat, until the background is in focus. One of those little circular Kodak depth of field calculators will come in handy.
In photoshop, you select the portion of the first image that is in focus, then layer it with the portion of the next image that is in focus. You also have to keep slightly magnifying each successive image, as the in focus area is a bit farther away from the lens. Eventually you end up with an image that is optically impossible, but striking.
Lucky for me, I have a friend who makes a very nice living doing just this kind of thing, and is intrigued by the concept..