IDG Answers is a community of experts who are passionate about technology. Ask a question or answer one below.
Open-IX isn't that widespread yet, but it is growing. Currently there are 23 Open-IX certified data centers.
The idea behind Open-IX is commendable. Basically, they want to bring a more European model to the US internet exchange points, and move away from a system where a handful of large companies operate and control North American internet exchanges. Data Center Knowledge has an article that discusses Open-IX that you might find interesting.
You can also learn more direct from Open-ix.org