Vista - Virtual Server vs. Hyper-V

1. Is there any info comparing the two?

2. Does Hyper-V correct any of Vitrual Server shortcomings which are in my
opinion:

a. USB support for scanners, cameras, web cams, thumb drives, etc.?

b. Sound?

c. Ability to expand a fixed vhd without jumping through hoops. (i.e. Using
a third party tool, connecting it as a data drive of another vm so the system
partition can be expanded, etc.)

3. Will there be future versions of Virtual Server or does Hyper-V replace
it going forward?

Thank you in advance for any information,
Joe