[saltylicorice]

It's pretty easy to sign up at https://www.ibmchefwatson.com/

It's free, and there's a pretty decent web UI once you're logged in.

[jadeddrag]

I could be wrong, but I think the previous poster was asking about getting API access to Watson itself, not the cooking site.

[r_edwards]

http://www.ibm.com/watsondevelopercloud