The short answer is no.

It's been a while since I used Excel 2004 for the Mac, but if I remember it had limited Visual Basic support, which we need for this addin. Unfortunately, Excel 2008 has no Visual Basic support and I can only hope the next version sees a return of VBA. In the mean time the user base for 2004 is too small for us to develop a dedicated solutions for; and perhaps unfairly we envisage that most advanced Excel users will use Excel 2003 or 2007 for Windows - through a Virtual Machine running on their Macs.

So to conclude, our focus for now is on Excel solutions for the Windows platform.