High bitrate (128+ kbps) streams are almost always strictly better than FM. FM audio is band-limited to about 15 KHz so they have bandwidth for stereo (the 19 KHz pilot and 30 KHz of bandwidth around 38 KHz for the stereo signal).
One other dirty little secret of the radio industry is that many studio-transmitter links are just 128 kbps ISDN links -- most of which are MP3, although newer equipment supports AAC as well. Additionally, while the exact codec of HD Radio is a trade secret, it's thought to be very similar to HE-AAC running at 96kbps. Even 64kbps HE-AAC sounds pretty good.
Back in May, Google announced that they would be making changes to their SSL/TLS certificates in the coming months: http://googleonlinesecurity.blogspot.com/2013/05/changes-to-our-ssl-certificates.html
If you use Chrome, Google's SSL certificates are pinned, so that gives you some additional assurance.
Microsoft calls this the "secure attention sequence." I have heard that older PCs' keyboard interfaces would directly generate an interrupt on reception of ctrl+alt+del, but I can't find anything to back that up.
Supposedly ctrl+alt+del was chosen to be the SAS in Windows NT because no existing app used it as a key combination.