Nothing is working right now, it's just how it is until they implement a fix. I'm personally worried that it'll do so much damage (already up to 2 days of downtime) that Minecraft will become even more legendary for being broken and badly developed :\
FYI, the new launcher is broken right now. Use the old launcher and it'll be fine. Linkie
No, it probably won't, actually. I've tried with both (from different users posting launcher backups) and I can't connect or join any servers. I think when they patched it and changed how you log in they either moved to new servers that couldn't handle the load or just screwed up the process itself.
Well I downloaded it, and I started to play on a random server and it actually (finally) worked!
But then I went to the super-earth website to download the old .jar file in order to play on their server but not I can't even get into the single/multiplayer screen before it goes black screen and non-responsive. I tried running it in compatibility mode but it hasn't helped.