I just ordered a new Powerbook - finally, my current machine is nearly 5 years old! - and I'm trying to figure out what the upgrade path to Tiger will be like. In past years, it's been a non-issue, as I was a student developer, but as a Working Person(tm) now, I can't get those deals any more. Can anyone provide any historical/rumorological insights on what the odds are that people buying new Macs now will get free/cheap upgrades? I assume it will be time based, something like 4 months back from whenever it gets released?