For those still looking for a Bootvis replacement for Vista, try the Windows Performance Tools Kit from Microsoft:

Windows Performance Tools Kit, v.4.1.1 (QFE)

As before, it is intended for system builders, OEMs, driver builders, etc.

Be sure to go to the "see also" documents at the bottom of the article. They contain some useful links on how to use the tools.

To bootvis veterans, I realize it is not quite the same functionally, but it provides some graphical representations of the boot process that are not obvious (at least to me) from the Event log and performance monitors included with Vista.

Hope this helps.