I've been using mine for a few weeks now.
Again, it depends on the sensibilities in your church. The key to Christian Freedom is that we have freedom in all this under Christ -- but we are to be cognizant of others, and not cause them to stumble. As the Apostle Paul writes (1 Corinthians 8:9), "Be careful, however, that the exercise of your freedom does not become a stumbling block to the weak."
But at my church, it's been a great tool. I use it in Sunday School, I use it when teaching the Bible Study I lead, and I use it during the service.
Both the Executive Pastor, and Teaching Pastor at my Church came over and took a look at it, and said they wanted one after seeing my demo of mine.
I have Logos (
www.logos.com) on my iPad -- and I have around 500 books accessible, including Bibles, Commentaries, Interlinears, etc.
Being able to go to a specific chapter verse with a couple of taps is great! Being able to read other commentaries in challenging passages is awesome. Being able to see the Biblical Greek and Hebrew definitions of words with a tap is sweet!
For those who love to study the Bible and don't want to lug around a laptop, Logos for the iPad is an awesome tool. I already had invested > $1,000 in my Logos library so I carry with me at all times more information than most Biblical scholars have had access to in LARGE Libraries. It's amazing to think about how far we've come.
So I get really irked when people talk about the iPad as a toy. It's been such a blessing to me. Especially when coupled with my Verizon MiFi.