We're using SignUp.com to organize our upcoming SignUps.
Here's how it works in 3 easy steps:
1) Click this link to see our SignUp on SignUp.com: http://signup.com/go/otFOoMu
2) Review the options listed and choose the spot(s) you like.
3) Sign up! It's Easy - you will NOT need to register an account or keep a password on SignUp.com.