It's up!
First impressions are really good. The browser is way faster, and behaves like a normal browser now. I tried it with the full 'HD' Eurogamer.net site, and that loads like a champ. Zooming works as expected, which was really annoying. Tested some more sites (including corporate), and everything is pretty great. No Audio or Video support though, as expected. WebGL in HTML5 is reported as mostly working, but I can't find anything that does.
The email App is serviceable. Email is currently stripped of most formatting (no html stuff) but still looks good, and you can only set it to auto-get email at minimum 15 minute intervals. You can actually send a picture attachment.
I read that apparently screenshots are now instant, which is neat. Near's user interface has been overhauled, and seems better. I particularly like being able to manage per game if I want to have Near goods downloaded automatically. You could already choose the option automatically download the first time you get something for a new game/app in 1.8, but this is much better. You can also filter showing only goods for games you've played, which is a good idea.
Playstation Plus settings appear in the Settings app marked with the Plus icon. You can set separately if you want to automatically update to download updates for apps (and games), for system software, to sync trophy info, and upload saves to the online storage.
I don't know that I've seen the option to add twitter and facebook details in the Settings before. There are a lot of settings for notifications now - per app that supports notifications, you can choose 'show on screen', 'light up PS button' and 'Play Sound'. This includes emails but also, say, Trophies, Friend's requests, etc.
The screen lock with password is apparently new as well.