From Kensington tech support:

"We are sorry to inform you that the MouseWorks software is not compatible with Mac OS X version 10.6 (Snow Leopard). We have no plan as of now to update the software, however we can only suggest you to check our website for any such update on the MouseWorks software."

Contrary to what this tech support person said, Mouseworks software does indeed continue to work on my Mac Pro with Snow Leopard installed. (There is something funny going on with the double-click speed which I can not quite figure out, but other than that, it still seems to function.)

When you click on Mouseworks in the control panel, a message comes up and says "To use the “MouseWorks” preferences pane, System Preferences must quit and reopen." When you click OK, it does what is says it would do and Mouseworks opens.

I liked this app a lot. But it seems to have stopped working after I installed Snow Leopard. Here's hoping that the developer continues to update this nice application.

Update went smoothly. Things seem to be working OK.

I have had great luck with Parallels. I only use Windows for a limited number of applications, but they all run great, and very fast. Updating Parallels when a new version is released is generally very smooth. My only gripe is with Parallels support. I've had the need to submit a tech support trouble ticket only a couple of times, but the folks at Parallels didn't respond to either one of them. No reply, no help, nothing. I just don't bother anymore.

This doesn't appear to work on my 2.66 GHz Mac Pro. Selecting "Safe Sleep Now" causes the machine to go into normal sleep - no difference.