[geuis]

Or, http://jsonip.com. Now serving over 10 million requests a month.

[nacs]

Love their "About" page linked from the homepage JSON: http://jsonip.com/about

Nice "Hire-me" true key in there.

[geuis]

Thanks nacs. I actually should make that false, since I recently started working with a new startup.

[bmelton]

jsonip.com is the the only one I ever use anymore.

In addition to being JSON, which is programmatically friendly, it loads the fastest for humans too.