Cool. We just hit Oasis 002 on our project at work. We've decided to kill the term milestone and use Oasis instead. Milestones imply regular intervals of progress. An Oasis is a nice place you come to (hopefully quite often) while wandering towards your goal. It's also not a good idea to skip an Oasis and try and head directly for one further down the line, you'll die of dehydration or code failure, whichever comes first.
Thanks goes to my coworker Bram for suggesting the Oasis term.