“Down for everyone or just me?” is a great little website created by Twitter developer Alex Payne that helps you check to see if a website is down for everyone or just you. For instance a website might be up, but you could be having connectivity problems with your ISP or local network.
We’ve started giving this link to our web hosting customers as one of the resources to use for troubleshooting when they think one of our servers is down, but it is actually a connectivity issue on their end.
via Daring Fireball
