Vista certainly had a less-than-smooth delivery, and there are still lingering issues that keep some away.   Microsoft CEO Steve Ballmer recently addressed the issue in a speech he gave at Microsoft’s Most Valuable Partners conference.Here’s an excerpt:“Windows Vista: A work in progress. [Laughter, applause.]  A very important piece of work, and I think we did a lot of things right, and I think we have a lot of things we need to learn from.  Certainly, you never want to let five years go between releases.  Can