Have an iPhone 4S?
The you have everything you need to bring to power of Siri and Nuance dictation to your Mac for only $19. Buying the full version of Nuance Dragon Dictate would cost you $199!
Using the the new version of iTeleport VNC app, you can dictate anything to your phone and it will input it to text directly on your mac running Snow Leopard or Lion.
The set up is easy, and can work even when no wifi connection is available.
This has saved me a lot of time, in fact I dictated this entire post using this process.
Just click where you want text to go, then dictate to your phone’s mic or headset!