Sadly, there isn't much going on of interest this summer. We have a big music festival every summer, but the quality of performers varies greatly. One year I happened to see Don MacLean there, which was literally a once-in-a-lifetime performance since he actually said he'd never play here again. That was about 2 years ago, and it was a great year for that festival with lots of great performers.
This year, with a new amphitheater, they seem to be shifting their audience quite a bit. The festival is more or less a folk music festival, but it seems like there will be lots of rock this year to bring in more people, with the headliners being Broken Social Scene and The Weakerthans, none of which interest me.