Way behind the times, this is months old news but it's still shocking today. To me anyway. I thought I should post about it since it's a relatively "underground" subject and therefore the word doesn't get around as quickly as, say, PS3 sucking.
Someone's got a 100%-speed Dreamcast emulator for PC working. Compatibility's got a long ways to go as you can imagine, but it's still a major feat to get it working at all.
It's called NullDC.
For instance here's Biohazard Code Veronica in action:

Here's the compatibility list:
http://www.1emulation.com/forums/index. ... opic=21524
This is great for me, since my DC's drive motor died.