You should still change your password for a lot of sites. (especially if they reported having the issue and resolving it)
There's a Firefox extension out called Heartbleed extension that tells if sites are currently vulnerable. It shows up as untrusted because Mozilla hasn't vouched for it yet. I found out about it from OWASP - a security organization - so I trust it. (Code is in GitHub if you want to read it.)
And yes, I verified this site shows as Green == Good!