No More Diapers?!?

Is it true? Could it be? We are seriously diaper-free in this house for the first time since October 2002??? There were times that we had 2 in diapers (never all three), but this marks the first time that we have not had one child in diapers!!!! Should I throw a party of some sort? Here's the story: Luke decided he would potty train himself (I take no credit!) when we were in Steamboat Springs in late January. I had no idea he knew what actually went into a potty. He had NEVER peed or pooed in the potty. He had sat on it at least 88 times, but with NO production. Then, he decides while we are in Steamboat, he would start going in the potty and wearing the big boy underwear. OK! No argument here! Once we got back, we would let him wear the underwear all day, but a diaper during nap and night time. Well, it became a little inconvenient to put the diaper on at nap time, especially when he always woke up dry. Then, 3 nights ago he fought the good fight to not wear a diaper. Why am I fighting him to make him to wear a diaper? Now, no diapers. I'm sure he'll continue to have accidents here and there, but I'm not having to change diapers!! Whoo-hoo! A new era in this house! Send the Diaper-Genie into retirement!!!
Just for the record: Cooper potty trained at 2 years 7 months on a trip to Kansas City; Natalie at 2 years 8 months on a trip to the Johnson farm in Kansas; Luke at 2 years 4 months on a trip to Steamboat Springs to see Grandmother. What's wrong with potty training at our house? They all have decided on a trip that that would be a good time to start potty-training. (???) Just another thing for my kids to make me wonder about.