I just have one thing to say: AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH! :)
I've upgraded my camera to the Canon 5D Mark II! I've been thinking about this for awhile and the time has officially come.
Allow me to be a camera dork for a minute ... the biggest difference between the Canon 30D (my "old" [now back-up] camera) and the 5D Mark II is the ISO capabilities, or the camera's light sensitivity. On my old camera, ISO 640 was just about as high as I could get (meaning I need more light sensitivity because I'm shooting in low light) without the grain getting really bad. On the new camera, I can shoot at ISO 1600 (SO high!) with hardly any grain. So crazy.
Can you see the difference? These are straight out of the camera and were both shot at the same settings (ISO 1600, f/2.8, 1/30).
And, here's the zoom so you can see the grain.
OK, dorkiness over! :) Can't wait to use the new camera this upcoming wedding season!