The one thing that Vista does really well is searching.
Now I'm sure some people would say that the Mac has great searching with spotlight - and it is very true.
But vista does a great job searching with specific criteria, even in un-indexed locations, like network drives.
It also has a nice save search function - which, when combined with the Windows Desktop Search: Advanced Query Reference, can be extremely useful.
For example. Let's say that I have a SQL Server that refuses to delete it's old backups the way it should. Let's also pretend that I don't want to have them removed automatically by some other process.
So I could browse to the folder that I want to find the old files, and do a search in vista using the cute little search bar:Then when the results come back, I can right click in the results area, and choose save search.
I can call it what ever I want, and save it wherever I want - my desktop, my documents - anywhere. Then when I want to perform the search, I can simply launch that saved search, and viola! I have my results, nice and up to date.