Tumblr suffering extended downtime, now out of action for almost 2 hours

Well the "Find out why" page that is linked from the down page is also down.

http://www.tumblr.com/docs/en/error_troubleshooting#service_...

Youtube also? http://downrightnow.com/youtube

This is incredibly annoying. I didn't realise how much I replied on Tumblr. I was trying to get the contact email for a few people for my YC application and they all have tumblr site's, I do too. Luckily Google has a cache.