I'm not an admin or moderator, but you'll need to go over to teksyndicate.com/bitcoin in order to set-up your mining account. It's really simple. Read the first post in its entirety and then you'll want to click on the "create a new worker" button to get started.
yup, tahiti is the name of the chipset in 79xx graphics cards and the [0-0] means it's the first device on your computer. (if you had crossfire, one would be listed as [0-1])