I happened to check the Apple Store Friday on-line at 1:15am PST (4:15am EST) and almost ordered it on-line. But since I read articles that the lines would not be so long, I decided to go to AT&T or Target or Best Buy instead. I drove by the Apple Store at 3pm and the line was 250 - 300 long. I visited AT&T - none until next week sometime, Target only had 10 16GB models, so I lined up at Best Buy. They handed out 50 tickets and I was about 10 people too late at 4:45pm. So I went back to the Apple Store which was now 350 - 400 people long and decided to order on-line.
Got my order in Friday, 3/11 at 5:45pm PST (8:45 EST) and it says shipping on April 1 for a white 64GB 3G AT&T version, but delivery by April 8th. We'll see, I've been lucky in the past with them shipping and delivering sooner.