Younicate Voice Shortcuts is a piece of freeware that helps you voice browse the web, play music and movies with voice commands.
I've found it also improves Windows Vista Speech recognition while browsing the web, often finding links with one or two word voice commands. This saves a lot of time and energy. Rather than reading an entire link, I'm able to read the first few words only.
You can find more information about it here.
A free download is here.