In reply to Ryan Cowles.

@Adam: Thanks for clarifying! I haven't heard that myself. But please don't hesitate to give us a shout when it does come up, and we can help troubleshoot the issue together. Excessive resource usage suggests to me that there may be a plugin conflict of sorts responsible for the trouble. Jetpack itself should actually cut down on resource usage, since it uses WordPress.com's servers to do some of the heavy lifting.