I've been following a mish-mash of Google News alerts as well as some 'security' influencers on Twitter, but have a feeling there's a more efficient way to deal with this out there...
If you are looking for the vulnerability reports and databases, I've already answered this in this stackoverflow answer.
Copy-pasting again for easy reference:
- Common Vulnerabilities and Exposures project (CVE)
- http://www.securityfocus.com/bid/ (BugTraq)
Various list above have feeds or subscription feature which you can subscribe to get the vulnerability information delivered right to your inbox.
If you want to keep yourself about the latest discovered security vulnerabilities, BugTraq would probably be your best bet.
If you want to keep track of security breaches of organisations, the news would be your best bet. There is no consolidated resources that provide immediate feedback about such matters that I know of.
If you're concerned that your account might have been included in a security breach, you should check out...
I think it's pretty good. I follow a bot on Twitter that tracks account credential dumps and within 24 hours, an email address in a dump was flagged on shouldichangemypassword.com. It's run by the same people behind AVG antivirus.
By the way, the twitter bot is here: