I am not a regular user of firefox sync, which is why I used my weak forum-class password on this account. No important data or passwords were leaked. Just wanted to give everyone a heads up. If you have access to this leaked list then the password of only those users would need a reset. Or perhaps reset ALL passwords. I don't think the list is available publicly, and I don't have a copy of it.
Like most people, I use the same password on many web accounts, however in light of this hack, I will not be doing so in the future. The great thing about openid support is that you only need to reset one password.
This recent hack raises the specter of the need for 2fa and openid support for all web services.