Do those services increase productivity when Twitter is down? :) - Morton Fox

Way #1: Always have a good backup. Productivity is based solely on being productive. - shanebe

Scoble - I've been wondering about your thoughts on noise music. - Bryan Woods

i can't get to this site... is it using the same server as Twitter? - Rudy Amid via twhirl

Twitter being down usually results in an increase of my productivity. - Bearded_Dave

I'd argue with how wrong he is (except for the not mattering part), but it doesn't matter. ;) - Evan Sims

I think it matters. How many security holes have arisen because PHP doesn't have taint mode like Perl? - Morton Fox

It bugs me that Jeff says YouTube is written in PHP. Multiple commenters have corrected the misconception to say it's written in Python, but the post hasn't been updated. Update: Jeff changed the article. Props to Jeff for going back to make the change. Philipp, thanks for forwarding. - Matt Cutts

I forwarded your comment to Jeff and he updated the post -- according to the update YouTube was originally PHP and then early on migrated to Python. - Philipp Lenssen