I tried preaching from my iPad this morning using Keynote (ref. this post). Two thoughts:

I'm pretty sure no one could tell. This was a huge deal for me. I don't want others to be distracted by it and I didn't want to be distracted by it. I'd rather people say, "That guy talks about Jesus and the cross a lot." rather than "My pastor uses an iPad." I liked that there were no shuffling pages and that it was easy to keep track of where I was in my notes. I think it was one of the better sermons I've preached both in content (iPad had nothing to do with that) and delivery (it aided me).

White text on a black background was a winner. Wow. I'm actually surprised at how well my eyes could pick up text with a glance instead of a stare. If I'm not using just one Post-it note in my Bible (my normal source of notes) I usually try to keep them all on one page of paper so that I don't have to shuffle multiple pieces of paper. Since I didn't have to shuffle pages of paper I made the font bigger which made the notes easier to see, too.

Preaching with an iPad actually turned out better than I thought it would so I'll probably do more of it in the future provided point #1 remains unviolated.