Amy, I was afraid the phone connection wasn't going to be too good because my seats that night were behind the soundboard area and it tends to cause interference.
Advice for meeting them before soundcheck, get there by 3 PM, they usually show up by 5 at the latest. Get a local U2 fan to help you find your way around, we got lucky and this guy showed us where to wait, even though it was a construction area it was the place to be!
Have a sharpie and a backup one ready too, have a couple of things ready to sign, bring a camera or two.
I did get Edge to sign my membership card, Bono showed up less than 2 minutes after Edge left and the letter from U2.com that I had wanted Bono to sign had gotten totally soggy because of the rain. I didn't think fast enough to find something else for him to sign so I just took some photos of him through the car window. (I should have used my map of Boston but missed my chance to get his autograph.)
Here are a couple more photos of Bono, everyone crowded around his car, he only signed a few things before driving up the ramp.

I'm in blue on the bottom right, my husband took these photos, it's hard to see Bono from where he was. I took more photos up close with my disposable camera. I need to get those photos printed this week.


Amy I did try to call you Thursday after I met them but got an answering machine so I didn't leave a message. It was about 5:30 eastern time.