Remote access company RemotePC (http://www.remotepc.com) says you can now remotely control your PC from a Mac.With the Remote Access Viewer for Mac, users can now connect remotely to any other Windows computer.  

Remote Access Viewer for Mac is currently available for Mac OS X 10.5 and 10.5 on Macs with Intel processors. It’s available by subscription: US$4.95 per month for one PC and $9.95 per month for up to three PCs.

The RemotePC utility can connect to one or more computers from a single platform, with each interface presented through a web browser.