at the macworld expo yesterday, one of jobs' graphics was a "zune" going up in flames. :lol: OS X users have been using the system upon which vista was based since 2000/1. that's about 6 years. it takes some getting used to, just as a caution for any xp users worrying if the transition will be painless. the 15 GB disk space is not actually occupied by software, but is used as virtual memory by the system, which will try to "reserve" physical RAM for various background apps. in OS X it's referred to as page-ins and page-outs, and it may tend to slow vista to a crawl at times. however, like OS X, it's likely vista can run on much less disk space, given the iphones will only have 2 GB, but will be able to handle a version of leopard and safari 3.x.