While doing some research on Venus, I came across this brilliant image of the Transit of Venus across the face of the sun, in June 2004.
http://www.howell-ltd.com/Astronomy/...usTransit.html
Details on the image.
Wow!
Found lots of other nice transit of Venus images here on SpaceWeather, too:
http://science.nasa.gov/spaceweather...ry_08jun04.htm
I can't wait for the 2012 transit. I need to get myself a Hydrogen Alpha telescope before then!