I can't understand the need to get into the ellipse. Sure it's cool to be that close, but honestly, the best standing view is actually outside the ellipse at the barrier at the tip of ellipse. At least you get to see the whole show, you aren't turning to see Bono, you can look up at the screens over the stage (kinda) and the curtains look pretty sweet dead on from that range.
When I was in the states, I saw three concerts, one from behind the stage (which is a great view if kinda wierd), once from inside the ellipse, and finally from outside the ellipse at the position described above. The third view was hands down the best, although there was a little crushing.
Btw, I'm from the uk and saw eight outdoor gigs, standing at all of them. The best position there is on the barrier at the one of the b-stages positioned at around 4 o'clock. This means you can still see the other B-stage. I prefered Edge's stage because he was on fire, but on Adam's side you get Bono at Sometimes, Larry and of course Adam.
I pitied the people who after queing all day ran straight to the front of the stage, my god the european stage must be at least 8 foot high at the front, their necks must have been awful sore.