Got a new bit of kit today.. couldn't resist...
Speedlite 580EX II
Bought it some hours ago, and I am in love.
Tried two sec, indoor and it's damn impressive:
polarizer filter, F4.5 1/125 with the 70-200 F2.8 IS, at 190mm from about two meters, indirect flash...
Can't wait to really need it at events or such