As a sysadmin/engineer, how does your current employer do on-call, and what do you like the most about the processes in place? Is there any part of your on-call process that you particular like the most especially in comparison to your past employers? Is there something that is so flawed and you hate so much that you can't help but mention it here? Additional to this, what on-call support tools do yo have at your arsenal? Who's still passing around a bulky laptop and a team blackberry? What's the 2012 version of this? I think it would be really interesting to here some feedback on how others do it.