First, here it is in the radar reflectivity data (the type you usually see on TV weathercasts). The center of the microburst is near the deepest red pixel. The time is 6:45pm.
A second view of the microburst comes from the Wichita Terminal Doppler Weather Radar (TDWR), an instrument designed specifically to detect microbursts, installed in the wake of Delta 191 and the series of downburst-related crashes in the 70's and 80's. Compare the location of "Wichita" on the two radar images and the freeway (Interstate 235, not labeled, but wraps around the west side of the city) on both maps to orient yourself.
From the ground, the microburst looked like this from my back yard about 10 miles away.
UPDATE: 8/4/10: I was going back through my photos classifying them and I found a curl on one frame, which is posted immediately below. Compare the image above to the image below. There were tree limbs blown down by the microburst in northwest Wichita. End update.
How do microbursts cause plane crashes? The diagram below will help explain (click to enlarge).
Added image to original post: Circles depict the amount of wind shear in knots. This display is in the control tower of major airports. Courtesy of: KXAS TV.
Fortunately, most airports with commercial airline traffic are equipped with a Low-Level Wind Shear Alert System. Forty-four airports have TDWR. Since these two systems have been installed and since pilots began to be trained in microburst avoidance in 1987, those once-frequent disasters have been all but eliminated.