Define: Floating Events are for procrastinators. Like "Do Taxes" as a floating event on Monday, if you didn't do them on Monday, it will shift to Tuesday. What makes it unique is that you can then assign a time and an alarm to annoy you to do your taxes on Tuesday. But if you did do the appointment on Monday then it will not float the event to Tuesday.
In saying all that the blackberry has a snooze feature. There might be a 3rd party software that might do it. Or you could do what I do and just schedule a float trip