Availability

When you run a social microblogging network, keeping abreast of your network availability can be challenging. State-run firewalls can be capricious, and it's hard to know if your site is available locally without being on the ground (or receiving a slurry of grumpy tweets). Where's It Up's http and ping tests let you check your sites' availability programmatically, requesting your homepage from servers in China, Saudi Arabia, Vietnam, and Pakistan, so you're the first to know when the firewalls have kicked in and your page is down.