As to the cellphone thing - stick to whatever your goals were. If that allows you to snoop a few days a week (or whatever) do it. Just be realistic about what you'll find and the fact that it probably won't improve your mood.
On the Vegas question, my W and I went to see "O" by Cirque du Soleil at the Bellagio last month. It's expensive (~100/seat), but was an awesome show. If you and your W like naughty shows, there are lots of those as well (we saw "X" at the Aladdin, but there's really no comparison between those types of shows and the high end stuff). Celine Dion is currently playing at the Bellagio too, but my W and I don't really like her stuff. There's always lots of comedians and standard fare. A quick web search will link you to the current show listings. Have fun.
