All tech companies to this. Development can be sped up tremendously if there is already a readymade solution that can be built on top of. Apple excels in building these acquisitions into their software and adding deeper integrations and a better interface. If Apple used PortalPlayer or Fingerwork's technologies as is the iPod and iPhone would never have been as successful as they turned out to be.Kind of like Apple rarely having ideas of it's own and just buying out other tech... down to the smallest things like Cover Flow.