Why is this being touted as 10.6?? It sounds like they are just patching and making 10.5 more reliable and effective?? Sounds like service Packs to me..
Without any new added features and just background features this should be a free upgrade or just 10.5.8 or something not 10.6
I don't think you understand what a service pack is because this is WAY more than a service pack would ever do. They fix holes and patches. This is going to reduce file sizes, update programs, etc. But yeah, I hope it's not $129. $20 for Leopard users would be nice.