While not as serious as other data beaches, it's still important to be aware that information was taken from the disqus platform that may affect you.
Your email address and password could have been part of the data compromised so you need to ensure you change your disqus password and any accounts where you used the same password.
Of course, you wouldn't use the same password on multiple accounts now would you? If you do, take this as an opportunity to change that practice!
Also be aware that your email address would have been added to spam and phishing lists so always be suspicious of emails that may take advantage of this.
So as ever, be careful what you click on.