Try this guy. It's pretty much a mess, but it will get you what you need and them some. I plan to clean it up for my TC16 talk on repo datasources, but this one has a ways to go.
Thanks Diego and Matt. Matt, you're right. That thing is a beast. I look forward to your talk at TC16. I'm still looking for a clean and elegant way to show in a workbook the people of have subscribed to it.
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Here's some more info that could help with other scheduling questions:
For monitoring help check out Michael Chen's blog post: New Views for Tableau Server Administrators— BI on BI
Item #5, Subscriptions Timer, is the one you'll likely be interested in.
Here's the conversation about it here in the forums: New Views for Tableau Server Administrators — BI on BI