I just switched http://jsonip.com from Rackspace/Slicehost to Linode about a month ago. I was a multi-year Slicehost customer and couldn't have been happier. It was only a matter of time after Rackspace aquired them that I was expecting problems. That occurred about a month + one week ago. (Sorry for the downtime to any users that might be reading this.)

I've since migrated the service to Linode and holy shit, it's such an improvement. The support is great, but even more their admin interface is excellent. Gives me so much more info than I ever had before. It's even a little cheaper than the plan I had with Slicehost.

Just to throw some numbers out there: jsonip.com is a node-based app that supports upwards of 6-10 million requests per day. Lets just say that I couldn't be happier with Linode.

Note to Linode: Do not ever sell out to Rackspace or else I will be forced to go live in the woods somewhere. Thanks.