Having made the switch after more than 20 years of PCs to Apple, with the purchase of a MacBook Pro at Heathrow Airport's tax-free shopping, I've slowly been shutting down activities on my recalcitrant LG laptop. I've already got the Mac versions of Microsoft Office, Adobe Lightroom and Photoshop CS3; however, one thing that OS X is really missing is a decent blog client. By far, the best blog client going is Windows Live Writer. It's probably one of the best pieces of software to come out of Redmond in the past decade.
Until OS X can come up with something equivalent, I'm going to be using either Fusion or Parallels to let me run it in a virtual machine, along with the handful of other Windows-only applications that I use for which there are definitely no equivalents. Either that, or blog from work, where I've co-opted my Windows Server 2003 desktop to run it. During my lunch break, of course.