Here is a picture of my pluggin my pi in for the first time. I wrote the Weezy OS to the SD card, using win32 image writer, plugged it into my monitor via HDMI, and plugged my cellphone charger in.
At first the green ok light flashed a little. Then it stopped. Power stayed on though.
The SD card is your standard blue 8gb sandisk card.
large picture: http://i.imgur.com/l0DRQ.jpg