Facebook told me that someone logged into my account there from a mobile device in China.

I'm on my computer at least 8 hours a day for work, so I got the notification right away and was able to take action immediately.
Maybe that's what I get for logging on from unsecured WiFi at a hotel. I keep my home network locked down tight. Just to be extra sure, added rules to my firewall to block all of Asia and Africa today. Been meaning to do that for a while anyway.
Most annoying part was going and changing all my passwords.
Haven't found any signs of intrusion on any of my computers, which makes me wonder if my Android phone was compromised.

I'm very good at keeping a network, and my Windows and Linux boxes secure, I've had years and years of experience doing that. This phone always worries me though, as I have very little experience with Android phones. Don't even know where to begin to see if it's the phone that's been compromised.