SnowMates - an iPhone app for groups of snowboarders
I've recently added an app to the App Store, it's called SnowMates. It's based around a message board - the idea is to help groups of snowboarders (and skiers) meet up and coordinate when they on a snowboard trip, holiday, etc. Rather than trying to call or message people to work out what's going on, you can post your plans to the message board, which is private to your group, so they know when and where to meet up with you.
"we're lapping the park until 12:30, when we're stopping for lunch".