there are a couple of dead links here. I didn't see how to raise an issue about it. I hope that the comment section is a good place:

• Step-by-step clustering guides from linode.com
• Pacemaker project statistics
• MySQL with Pacemaker
• RabbitMQ - High Availability with Pacemaker and DRBD
• Making OpenNMS highly available with Pacemaker
• Nice walkthrough of Xen+DRBD on Debian (server does not reply)