Well, I had a long reply written up for this and my login timed out and I lost it all. So then, briefly, I'm still excited about creating those versions, but the reality of my full-time job having gotten much more demanding, as well as some of the other barriers like the fact that I don't own a Mac (and haven't even used one in many, many years), as well as the difficulty of publishing applications for Macs (not to mention cost, which is a significant factor for small developers like myself). Linux probably wouldn't be too difficult, as I could install Ubuntu or another distro in a VM and work through that, but I think aside from a handful of folks who would really like a Linux version, the demand isn't very high (especially compared to Windows and Mac versions). Short story even shorter: I still want to, but I still don't have a timetable.