It's hard to believe after a couple of years of "Windows Longhorn" and "...in the Longhorn timeframe" that it is now Windows Vista. We're already seeing all the jokes about "Hasta la Vista" and how one of the meanings of Vista - "A distant view or prospect" means it will be even later than expected.
It'll take some getting used to - I seem to remember that Windows XP seemed like a really stupid name too when that first came out. Of course at that time, Windows XP was a lot closer to shipping when it changed from "Whistler" to "Windows XP". Names like that just make you think that Marketing (for most companies, not just Microsoft) has a two drink minimum.