Wow,Gardengurl hit it on the head.
While you're thining your Irises it is a great time to share/trade.Look around your nieghborhood to see who else has Irises or flowers you like but don't have,maybe they would like to trade. I did this 2 summers ago when I was thinning my Daylilies,I noticed the nieghbor down the street Had Day lilies,but she had only Yellow ones,I had Reds and Oranges.Now we both have very colorfull lili beds!! And it's grown,we now do a yearly flower/plant swap on my street,and I've made a great group of gardening friends.
Have fun keeping your hands in the earth!