Parallels Desktop has been updated to version 9.0.24237 with some fixes for issues related to the upcoming OS X Yosemite. The release fixes a crash that occurred when starting up Parallels Desktop 9 when running Yosemite, and it squashes a bug related to dragging and dropping files between Macs with Yosemite and virtual machines. It also removes a black screen that appeared on startup when running Mavericks 10.9.3 and 10.9.4 virtual machines, resolves an issue with Parallels Desktop 9 failing to update, and ensures that network connectivity remains after resuming a virtual machine. ($79.99 new, $49.99 upgrade, $39.99 educational, 361 MB, release notes)
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Multi-Monitor iChat in Snow Leopard
In Snow Leopard, on a multiple-monitor system where you're using screen sharing over iChat, dragging the tiny inset preview of your own screen to another monitor shifts the remote screen to that monitor.